I can really feel where you're coming from. I was in a very similar situation about a year and a half ago. I was emotionally unsatisfied with my boyfriend and I ended up turning to my best friend, the one person who understands me completely, who also happened to be my ex. Like you, one thing led to another and I ended up cheating. I'm not proud of it and yes, I did feel guilty afterwards, but it felt so right and so amazing at the time.

But it will cause problems further down the track (for you) if you are to stay with your current boyfriend. It's been a year and a half since then and whenever there's a long absence of romance, I find myself, thinking, wishing that I was with my ex and him doing romantic things and making me feel like the most beautiful woman in the world.

But girl, this will wear you down emotionally and mentally after a while. And I wouldn't wish upon anybody to go through the mental and emotional pain I'm going through.

What I've learn from my experience was that my ex didn't actually want to get back together, he was only playing with me and he was just after sex. Sex between the ex and I before we broke up was the most amazing sex I've ever had with anyone, so I guess he wasn't ready to give that up just yet.

Truth is, if the guy who is hitting on you already knows you have a boyfriend, is also friends with your boyfriend, and is still willing to go behind his friend's back and betray him by hitting on his girl, then he's not very trustworthy and if you do decide to leave your boyfriend for this guy, then chances are, further down the track, he will betray you for another chick.

I know I'll get loads of down votes but I'm just speaking from my experiences and trying to help.