We used to text every day and see each other at least once a week. Then he suddenly stopped responding, sometimes he'll text me back but it's only a few times a month and about a specific thing, while we used to text just about how our day went etc. There wasn't any major event that would cause this change (at least what I'm aware of) and when I asked him about this he always said that he didn't have time.

It feels weird, because when we see each other at work (also a few times a month) he acts totally normal, we talk a lot and it's fun, but I think that maybe he doesn't want to be alone with me anymore. I'm constantly thinking about what I did wrong... the true is that I started to act a little crazy, but only after he's been avoiding me like this for some time. I just feel so sad and angry at myself.

Yeah and we didn't have a romantic relationship, he was more like my mentor or a parent.

Has this ever happened to you? Do you know what I should do?