Feeling guilty....

I'm feeling guilty about not wanting to breastfeed anymore. Part of me wants to keep going and part of me is so stressed about it. I love that I can supply her with food (enough sometimes.... but sometimes it's like she's not full and wants to keep eating but I'm empty.) I feel so alone sometimes when I feel like I can't take her into the store with me because I'm afraid she'll start crying and then I have to find somewhere private to feed her.. my husband feels guilty because the only way he can help me is by changing her diaper and holding her for a little while until she's hungry. I dont have a supply built up so my MIL wants to watch her sometimes to help me if I need to go to the grocery but she can't. I'm just in a funk. Sometimes I'll pump and when I have a full bottle with like 3.5 oz and she drinks it, she's so happy and content after... but when I BF, it's like she's still constantly hungry. I know she doesn't have to work as hard with a bottle, and she does great going back and forth, just sometimes seems like I don't have enough and she's still hungry.