the little bad

A few years ago, when I was still studying, we spent everyday together, as I went to his office with him. Little discussions here and there but we got along and it was great.
Now, we're both working from home and we spend everyday on the computer and cellphone and we barely talk to each other. I feel I've been looking a lot at the little bad things he usually does but, to be honest, my reactions have been the most we have been interacting so far. Not really sure what's going on.