am i being overdramatic?

an old friend of mine left me, no explanation, no goodbyes, just left. its not like they died or anything, ever since they left i started questioning myself if it was because of me. i get overly anxious and get severe anxiety if i did something wrong, i never wanted them to leave. they started hanging out with my friends behind my back. In the long run i figured it out through another friend of mine. all they said was they werent in touch with their feelings. not even a simple sorry for how they hurt me in any way. but of course i never said anything because i always dissmissed my own feelings until now. now that i've realized i tried my best to fix things, i feel angry. i hate felling this way, im supposd to move on but i cant without the feeling coming back to haunt me. i dont feel like myself anymore..