Emotional cheating?

I'm so exhausted. So after gruelling weeks, i just learned I'm the "3rd party" in a relationship. He is in an abusive relationship and I seem to be where he feels happiness. We had been talking intimately for 3 months and he treated me so special. I thought I was the only one. Imagine hours and hours of getting to know, sharing ideas, laughing, venting, calling, giving gifts to each other, caring for each other when sick, doing what the other one recommends, updating each other almost everyday, he even told me no one cares for him when he is sick and so I thought i was the only one and cared for him and at the end of the day, he still cannot leave his abusive relationship. I feel that he loves me and is afraid I will leave him but I'm so sick of the situation I'm in. How do i deal with this?

Emotional cheating?
Post Opinion