Thanks for your replies, guys. To answer some of your questions:

I have two brothers.

One has his own issues; our relationship kinda of degraded this year. To the point of not really having one. He recently got a job and is gone all the time. And before that he would leave for weeks to months at a time to a friends house without telling our family. I rarely get a couple words out of him a week.

The other brother is a bit younger than I am. I guess I could talk to him about some of the stuff. We have a much better relationship. But he kind of puts up an emotionless front; like things don't bother him that much and that it shouldn't bother me. He's also very averse to helping out around the house. So I really feel like the only one taking care of certain things. If I'm not doing things then my mom is. And my dad is the one bringing home the money in the small ways he can.

I may be acting fairly normal but when she asked about my brother feeling okay or not I was acting the same way earlier. Also, she walked in on my crying in my room last week and didn't say anything regarding that. She just started talking about something (Of course I don't remember what because I was angry for her not at least saying "What's wrong?").

I just feel really guilty. I feel like maybe I'm not helping enough and other times I feel like I'm helping too much. I think the real problem is that I've not been as accommodating to my mom as I have in the past. (By which I mean I'm not enabling her in areas where she's capable of doing things. Still I feel I walk the thin line of not-enabling and just being cold-hearted/selfish). She's rather depressed as of late and so this could add to it.

I just want my mom and I to have a normal relationship.