<human>: I recently broke off a really great relationship with partner of 3.5 years.  I'm still really sad and confused about the breakup, and definitely not ready for a new relationship.  I'm also really sad about the pain I have caused him, and don't want to hurt him anymore.  Given this circumstances, I've definitely been feeling extra lonely for companionship. 

I have been becoming closer friends with one of my ex's friends recently due to seeing him often at work.  The other night at a party we ended up snuggling (fairly innocent snuggling, but still).  I know my ex would be really upset if he found out, and I told the friend the next day that I had crossed a line I should not have crossed.  He seemed sad but understanding, and I was sad too.  The friend admitted later that he had had a crush on me for a while, but is willing to remain friends.  My heart was all fluttery, because I know I have had a guilty crush on him too for a long time, even while I was dating my ex.  It's bad, I know.  I see the friend nearly every day, and I'm not sure how to act. I definitely still have a crush on this person (even more now that it's in the open), but I respect my ex too much to ruin the entire memory of our relationship over a fling with his friend.  It's really not an option.   

What can I do to stop thinking about the friend when it feels so good to think about?  I'm not a person of strong will in these situations, and every time I see him I just want to grab him and take him home with me.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Have crush on recent ex's friend, and he likes me too.  Don't want to tarnish ex's memories of recent relationship over fling.  How to get over crush when I don't want to?