Why?

I've tried, I guess too hard and shouldn't have, to help my alcoholic ex. And now I'm alone again, with the exception that my sister is living with me and now I wish she wasn't here either. We just don't know each other and are not close. I try to talk to her but we just don't click, so to speak. I'm really stressed and depressed. I have a lot to do including work and school. I have a lot of anger and resentment due to my involovement with my ex. Because of the anger, I sometimes don't know what or how to speak to people without seeming upset. When I go back to school I'm planning on looking into counseling. I hope it helps. Does anyone have any other suggestions? Thanks, SJH