something new...

So my depression has been ok. I had some tough times recently but I managed through them. There is something new that I am experiencing lately that has me puzzled and concerned. I am becoming easily annoyed with people that are quite important in my life and even holding a grudge. Now its not that they are innocent. There is usually something legit that sets me off but I can't seem to just forget about it, "forgive and forget". Lately I feel like I would rather be alone then deal with stupid crap. In the past I would just take a break and eventually act like nothing happened. Now, I am dealing with a desire to just keep my distance. Am I hiding or protecting myself from dealing with things I find asinine? Is this a side effect from my depression? Or am I finally standing up for my own feelings?