Am I being a stalker or showing problematic behavior towards my crush?
I met my Crush almost three years ago. In first year we both went in the same class. Then we went into different classes. We both go to a Vocational colleges/school (I think this is the name in English but I'm not sure because I don't think this type of school exists in a English speaking country). We both looked at each other a lot. 4-5 Weeks after we first met she told her friends that I broke her I heart. I don't know how I broke her heart I never talked to her at that time. She said it kinda loud when I was just 2 meters from them while we were waiting on the teacher to arrive. After a couple of weeks I talked to her for a couple of minutes but it was kinda awkward because I don't know how to make the first move. After this she and a friend of her looked kinda exited and happy. The next time I talked to her I told her that I liked very much her (I now know it was a mistake telling her so direct and I feel ashamed of it and wish it never happened). After a minute of silence she told me she has another relationship in Ukraine (She is a refugee). The next day she and one of her friends was laughing at me when I looked at them for a second (They stared at me for like a minute before). Two months later a friend of her asked me why I'm often looking at her. She said it in an angry voice from the table next to me where my crush, her and a couple of her other friends were sitting. I didn't said anything. The next break my crush asked me if I would be angry at her this was kinda in a friendly, relaxed and interested tone. After I told her that I'm not angry she said that I look angry at her. Then I told here again that I'm not and she just said okay and went to her friends. After this we had an internship and she had a surgery so we didn't see each other for 2 months. On the day before the internship started she followed me to the train station first the one next to the school and then to the main train station of our city. When I went into the subway to my home she was standing at the subway platform and she watched me going into the subway and driving away. This subway line was the only one at that platform. Then after she returned to school we didn't talk to each other for a couple of weeks. Then she asked me about our timetable and homework. After this we didn't talk for a couple of months. Then a football tournament of my school we were both having a headache because it was to loud in our school gym and were sitting in the entrance of the gym. I sat first and around 20 minutes after I sat down she came as well. A couple minutes later our teacher said why we were sitting there. We said that we were having a headache. Our teacher asked us to write in which room we were having the next day in our class WhatsApp group. My crush asked me if I could write it in the group chat. This was the last time we talked. After the next day were summer holidays so we didn't see each other for 6 weeks. After the holidays all of her friends have left the school and we were in different classes. The first couple of months she was always sitting alone in the breaks. I was alone too. She always sat close to me(2 tables next to mine). Then she was spending time with a boy from her class for a couple of weeks in the breaks. I often looked at them because I was jealous and worried they would start a relationship. Then they sat down directly next to me. I looked kinda sad and jealous and couldn't hide it and she definitely saw it. I didn't say anything. Then they never spent breaks with each other again and she was again alone in breaks and sitting close to me. One time she sat next to me when I was with couple of my friends who are also her friends. I never sit with them in break but this was an exception. Me and my crush didn't talk to each other but we were talking to our friends. Then a couple of weeks later she was spending time with a another boy from her class for a couple of weeks. I always went somewhere else when they were spending time together. After the couple of weeks she was with a girl in the breaks for the rest of the school year. At the end of this school year we had a football tournament again at our school and she sat close to me but not directly next to me. I sat far away from the entrance. I sat there first and there was still enough space so she could sit somewhere were I'm not but she choice to sit next to me. Then we had summer holidays again. After the holidays she was sitting again with that boy from her class. I often look at them in break because I'm scared they are starting a relation or are already in one. I don't think they are in a relationship because they often keep a distance from each other(2m outside and 1m inside). I'm almost always at the same place in the breaks. They often sit close to me She knows that I'm looking at her because she also looks at me often but sometimes when they go to a place where I can't see them I go somewhere were I can see them. One time I saw them leaving school together and I went to a place where I could see the bus station where my crush gets in the bus to see if he was going with her and I did. I know this was problematic and since then I never did anything like it again. I still look at her often in the breaks and don't know if I cross a line with it or not. She doesn't make any signals that she is bothered but I'm still worry if that it is not okay what I'm doing. She still sits down close to me and looks with me. I think that she also has crush on me but I'm also aware that I might be coping. I regular imagine us being in a relationship. I would be fine with her being in a relationship with someone else if she would be happy but I'm still scared that she is without me knowing about it. I don't follow her home or somewhere else. I only see her in school and nowhere else. But I'm still worried that I might be invasive to towards her privacy.