OP, you can't 'expect' love, regardless of how much you do for your kids.
My relationship with my eldest daughter can be like this, but it's just how it is with teen/tweenagers. Give and take doesn't come into it where feelings are concerned. We are here for them and they are entitled to our unconditional love, no matter what. They don't have to 'earn' it.
All that said I understand how you feel and I often feel similar. I read about children saying how much they love their parents and it would be lovely to hear that from my children, but I love them regardless of how they feel.
Somebody shared this here once and it has comforted me when parenting my girls has felt tough.
"A really important but horrible developmental phase in teens is pushing you away.
They have to do it. It’s the start of independence and being separate to you. But so many of them are horrible about it because they simply don’t understand what’s happening.
You know when children are little and we get touched out? I think that’s the best comparison, where they fight and resist any warmth and closeness. Perversely it doesn’t mean they don’t need it.
Also, any hint they are children is likely to be met with rage because they are trying to go forwards and not back.
Everything you say will be wrong because in order to establish who she is, she has to establish who she isn’t. And she isn’t you - she’s smarter and more intelligent and knows more and you - well, you are so stupid and you know nothing and you’re creepy.
Take heart. She won’t have meant it in the sense that you think. She means all the above and she doesn’t know it herself."