I see where you're coming from. My Ts have told me positive things about myself over the years that I have a really hard time believing. My last T, however, acknowledges that when I feel so down and horrible about myself, that it FEELS very real to me. More importantly, she says that just because I feel something, it doesn't mean it's true. I found that concept very comforting.

You don't have to suddenly think you're the best thing since sliced bread, but I think your T just wants you to consider other possibilities. She asked me a similar question about others- if I thought some people were worth less or less valuable/deserving than others, and I thought about it and said "no." I didn't and still don't think any person is worth more (or less) than another, and hey, I'm people too!

Sometimes it's still tough to love myself 100%, but it's been easier by opening my mind to these ideas. Hopefully you can give it a try too.