My daughter is 11 yrs old . she was always very loving and now she acts like she hates me. i realize it's age and puberty but it's only me she treats?

Painful!: I can imagine how painful this is, but it needs you to be strong in your patience. Try neither to retaliate or woo her while still communicating as well as possible. Psychotherapy for you can really help. Explore possible causes - abuse by someone, etc. Learn how to deal w/ her and get support as you do. Perhaps it can lead to some sessions for her or together. A trusted 3rd party can be a bridge.