Out of the gate...

As I mentioned before I just recently split with my boyfriend of a year. It seems as though I had a couple admirers right out of the gate. One of which we'll call "Kurt".
Kurt and I have know eachother for a while. He was a friend of my brothers who was a bit older than I and married. Earlier this year we found out that he and his wife were getting a divorce. Kurt and I formed a friendship and over email mostly we started chatting to pass the time. We'd make jokes and have serious chats about the stated of both our relationships. I listened to the stories about how he was dealing with his soon to be ex-wife, and how she was dealing with him. And he'd get to hear about the boyfriend and my issues with him as well as his issues with me.
The time came where I needed to have "the talk" with my boyfriend about what we were doing, and where we were going, if anywhere. It turned out we weren't going anywhere and it was time to part ways. Just as I was leaving his house after a lot of tears and goodbyes, I get a text from Kurt. "How are you doing?". I called him, and told him that I didn't know how he knew, but I had just left, and "we" were done. I ended up meeting Kurt for a beer later that day to just get out of the house and have someone to talk to.
We continued to talk online through the upcoming week and we were gonna grab a bite to eat on that Friday. I didn't know what to make of this meal. I didn't know if it was a date, if we were just two friends going out to eat and have a good time, I just didn't know. Later at the bar, it became abundantly clear when he made a comment about kissing me. Okay, I guess this is a date.
The next day was my brother's birthday and there was a party. Kurt, being my brother's friend was of course going to be there. I didn't know what to do with him, how to act around him, he obviously wanted to be affectionate. But I was uncomfortable with that and tried to keep my distance without being a bitch.
Things continued down an uncomfortable road for me. I just got out of a relationship, he was still technically married, he was my brothers friend.... I told him that I needed to take a step back from whatever "this" is. He said that was fine and understood.
Turns out I missed talking to him. We slowly started talking again. I started flirting again. And Friday night we went to dinner and I ended up in the same place all over again. Uncomfortable because I want to be single, because he's still married, because he's my brother's friend and because I'm afraid that he likes me much more than I like him and wants more than I am willing to offer.