So my ex and I dated for a short time 2 years ago, broke up and decided to remain friends. We have lived together this whole time and continued a sexual relationship even after the break up until he got a girlfriend about a month ago. That's when we stopped the sex and sleeping together.

However, starting 2 weeks ago he started climbing in bed with me and cuddling/touching me. Even though we haven't outright had sex, he has rubbed me down there with his foot and press against me with his legs/knee. He continues to do this even after he said we should stop when he let me do oral on him about a week ago and he felt terrible about it. 

I feel like all this might lead to sex and I'm a bit scared. Should I nip this in the bud before it leads to something more? Why would he do this with me even though he has a girlfriend? I don't have a lot of relationship experience so I'm always wondering what his motivations are. Even though I know it's wrong, part of me wants it but I'm afraid that this might lead to ruining our friendship.
user
My ex-roommate cuddles and touches me even though he has a gf and has cheated on
assistant
So my ex and I dated for a short time 2 years ago, broke up and decided to remain friends. We have lived together this whole time and continued a sexual relationship even after the break up until he got a girlfriend about a month ago. That's when we stopped the sex and sleeping together.

However, starting 2 weeks ago he started climbing in bed with me and cuddling/touching me. Even though we haven't outright had sex, he has rubbed me down there with his foot and press against me with his legs/knee. He continues to do this even after he said we should stop when he let me do oral on him about a week ago and he felt terrible about it. 

I feel like all this might lead to sex and I'm a bit scared. Should I nip this in the bud before it leads to something more? Why would he do this with me even though he has a girlfriend? I don't have a lot of relationship experience so I'm always wondering what his motivations are. Even though I know it's wrong, part of me wants it but I'm afraid that this might lead to ruining our friendship.
user
My ex/roommate cuddles and touches me even though he has a girlfriend and has cheated on
assistant