My SO and I have been together for a 4 months but have been the very best of friends for almost 8 years. In the last 2 weeks our sex life has changed drastically. We have sex almost every night.. I'm always on top (where I normally climax) and here lately I haven't but he still has. I dont know what's wrong?? Its not him. He is just fine in the bedroom but I can't seem to do my thing....?? I dont get it.