<human>: Need some advice here. No idea what to do. My girlfriend of 13 months,  the love of my life & friend of 25 months just told me that 5 months ago she kissed a former colleague  (a sleazy married guy she had previously told me she thought was handsome) of ours on multiple occasions (sober and drunk) , including a session which involved heavy touching above clothes and an instance where she gave him a massage.. Apparently they also texted a lot for a short while. This guy was in our house and we were having a few drinks together a few times, I knew he was a scumbag but I had no idea he would try something with my girlfriend in my own house - that's a separate lesson.

 My girlfriend promises that the abovd was the extent of it -there was no under clothes touching (as far as she 'remembers' and I am inclined to believe her but naturally I find it very difficult to trust her. Her reason for doing this?She says she thought I was just 'using her' at the time because money was very tight and she was paying more than her share of the bills, however she knew my financial situation. She said at the time she wanted to break up but couldn't bring herself to it... Supposedly she has regretted her actions immensely and has wanted to tell me daily.... I asked her what's changed since April and she says- now she realises that she wants to spend the rest of my life with me - but from my perspective all that's really changed in the last few months is that I have now got a stable income. Not sure what I should do here because I am not sure if I can trust her, especially if we were to face the trials of marriage....

Can you give me a shortened version of the text?
<bot>: girlfriend admitted to cheating on me( no sex) in April, not sure if I trust her enough to continue our relationship, love her immensely. Help