(TL;DR) so it's been 3 months since we are in a relationship It's a long distance relationship, so there's a guy who has a crush on my gf and my gf knows it clearly and they are both getting close which i am getting insecure about at first i wasn't having any problems.
i was like “its okay he just has a crush just keep space between him and you(my gf)" so later on they both started to go out for playing badminton and even planed to watch movie together by taking him with her female best friend and she(my gf) said its for safety but her female bestfriend refused to take him together also sometimes they go out hanging out and he even pays for my gf outside so later on i talked to her about it and she was sorry for it and said she'll not do it and will give me her location when going outside.
after some time she again hung out with him and she told me about that and was sorry for it and then i sometimes caught her deleting chats with him she said it's nothing and after sometime i haven't noticed him with her so i was okay okay.
but yesterday she told me that she and that guy are now going to watch movie together i asked will there will be anyone else with them she said no she and that guy will be alone at home and will watch movie on laptop
I showed her i dont feel insecure and she can do whatever she want because i just gave up now i dont wanna remind her again and again that it hurts me
i feeling so shit now that guy is also older than him no need to mention it but i am just feeling very shit now idk how should i even talk to her about all these
she's also not stable mentally and is anxious she said wherever we talk about these problems she says her hands are trembling and she's feeling anxious and then suddenly we skip the topic also we stopped showing affection now there's just a dry i love you
idk how should i respond to this i am feeling insecure and shit (Sorry for my english my grammar isn't good)