My personal trainer took advantage of me?

I saw this personal trainer for almost 2 years. He helped me turn my life around. I lost 20 pounds & became an athlete basically. I confided in him 3 days a week about everything from my childbirth emergency c section to my husband and my relationship. My trainer is married and 50 years old. I am 32. Several months ago I ended up drunk at his studio and nothing really happened but silliness. A dew months afterward, I went back to him and explained I have bipolar 2 and that i was starting a new medication. He would joke with me and tell me to skip my medicine for a day and would flirt with me constantly. I liked the attention and I started falling for him. About 2 weeks ago we started flirt texting and we ended up hanging out and had sex. Afterwards, he kicked me to the curb. Literally. He won't even speak to me. Did this man take advantage of me? I can't even remember the details of the night's event and he refuses to tell me what happened. I don't know what to do. I feel so used.