sex problem.

My SO and I have been together for a year and things have been great!.. except for the bedroom. He always does an amazing job at pleasing me- butttt I don't seem to really satisfy him. Afterwards he always talks about what I can do differently. I'm glad he's communicating but to do this after every sex session just makes me feel like I don't satisfy him.. I just don't know what to do- but it makes me feel like a failure in this department. Have any of you experienced this?