To give some context and background I'm a 22M who was very antisocial in highschool and I'm still a little shy and haven't had a ton of friends but I would consider myself more extroverted and I enjoy talking to people and doing things and going out. Recently I've been starting to come out of my shell more but would still consider myself someone with low self esteem and a little sensitive, especially towards rejection.
But I started working at a place for about 5 months and when I started I felt an instant connection to one of my coworkers, he is 25M not in any romantic way but I've never really had a best friend but this was someone who I thought we could grow to be best friends eventually but it just hasn't really happened. We hung out with some other coworkers a few times when I first started and we have hung out a few times just us but not as much as I would like. He thought I liked him romantically but I quickly shot that down and I didn't really feel like that changed things but I figured I would mention it. But the last few times we have set up plans to hangout and he has kinda flaked on me and I'm fairly self aware or at least I liked to think so and I can kinda of pick up hints on when someone doesn't really want to hangout or like me that much but we get along good in my opinion and I don't think that is what's going on but I can't stop thinking about this situation and it is starting to frustrate me and make me visibly sad when he bails on me which I have never really felt before. I think the next step for me is to get some clarity and maybe closure on what exactly he views us. Maybe he views us more as friendly coworkers or just a friend but I think I need to tell him how I feel I just don't know exactly what I should say to him. If you made it this far thank you for reading all this and any advice or feedback would be appreciated. Am I misreading the situation, being too sensitive, or just he could be really busy and the reasons for not hanging out are just what he says they are.