Is it normal for me to randomly start hating my roommate?

Is it normal for me to randomly start hating my roommate? My roommate and I have lived together for the past two years. We have both come from "broken families", and have had some serious talks and even consider ourselves really close "family". However, one day about two weeks ago, I just randomly woke up and started getting pissed off at every little thing he started doing, only never really told him. I have this idea in my head now that he is always wanting to prove that he is better than me and more successful in some way through things he says. Now it has all added up and I'm not really sure why, but I just hate the guy all of a sudden and I feel as if this whole thing is my fault, even though we still try to act, "normal" to each other even though we both know something is up between the two of us, it is like we can both sense that we are enemies even though we don't know why.

is it normal for me to be acting like this or may there be some underlying thing such as anxiety or self-esteem issues going on in my head and I am just taking everything very hostile.