Slowly Being Burned by My Sister

Down to the nitty gritty of my real problem I am having and how to handle it. I have one older sister who I love with all my heart and hope to be like when I am her age but our relationship as sisters sucks. I've been praying about this relationship for a long time and will continue to pray for it. It's not that she's a "bad sister" or even that we don't interact or care for one another. In fact we are actually quite close to one another. The problem is I'm not sure its healthy for either of us to be around one another. Everytime I get around her (which is around twice a week) she seems to burn a little piece of me that never seems to heal quite right. We both grew up in Christ and each one of us is trying to follow what God wants from us so I know she knows how to love, but I'm not sure she even knows she's hurting me - someone who loves her unconditionally. Let me describe what she does just to make it clear.

It might just start out as a little sarcastic saying like "Oh, you know Stephanie really isn't that smart to figure it out," usually saying this with a smile on her face. I smile and come up with some kind of excuse why I didn't figure out whatever I couldn't figure out. This stings a little but I get "over" it, but by the end of our time together she has made so many comments, some in sarcasim ,some not tearing down my self-esteem, I begin to doubt who I am and if I really am as pitiful as she makes me sound. Or there are the times when I get compliments from other people, for example my mother complimenting me on losing weight and looking thin. My sister's response was "We're the same size MOM!" like my mom complimenting me implied that she was fat. (Not to even mention my sister has had two babies and I haven't which in itself is kinda an insult that after two babies me and my sister are the same size). Its like everything is about her. Or when I simply ask my sister if she grabbed my niece's binky before leaving the house she replies by saying, "I am her mother, Stephanie, and you aren't," like I was taking her position as a mother when I simply asked a question so when we went out my niece wouldn't be crabby. My usual response to my sister is silence while really I just want to burst into tears from the hurtful things she is saying to me. My sister and I attend the same church service and I have been finding myself not even wanting to go to church because she is there so instead I find myself at work instead. My life with Christ is suffering from this so I have made the informed decision to switch churches but I cannot help to feel at a loss of what to do about my sister. My love for her is unconditional but I'm not sure about how to tell her she's hurting me or even if I do tell her if she'll even listen and change what she says. My worst fear is by telling her how hurtful she is she will get angry and disappear. I don't want to lose my sister but I can't keep losing part of myself everytime I see her. Please, all I ask for is your prayer because God will find a way. I know it.

Steph,
Arizona

Please read Girlfriends' mentor,
Faye Pind's response