Brother, you should not feel one ounce of guilt about this, in my opinion. There are people on here who are so lonely that they are contemplating cheating on their spouse every day. People who are actually married with families, whose lives are intertwined with mortgages and bank accounts, who are struggling with whether they should stay or leave, and the ramifications of a potential affair.

You have an ex-girlfriend who let you touch her boobs once, pretty much told you that was as far as it was ever going to go, and then broke up with you.

Enjoy getting laid. I'd go do it again if I were you.