<human>: Some background/context:

Myself and my ex dated all the way through college, and split up about 6 months afterwards. We were having problems which I won't go into, but the final blow was when she went out to a party and kissed another guy. We ended it soon afterwards.

Since the end of college we have worked in the same office, which for obvious reasons made the breakup harder to bear since there was no possibility of no contact. We muscled through it, however, and now six months later I feel like we successfully transitioned to "just friends". She is still the good person I dated, but the (admittedly low-level) infidelity of hers ended my faith in her and my desire to be anything more than friends.

The job pays much more than anything else I would be able to find, and is flexible enough with vacation/sick time to allow me to pursue my career in another field, so I don't want to leave it. She seems to have settled into the position as well for the time being.

I probably wont be ready to look for another relationship for a few more months, but you can probably see how this will be a sticking point in any future relationships I have. Daily contact with a long-term ex isn't exactly comforting in a new boyfriend, and I would never even consider trying to hide it.

So, do you have any suggestions for how I can broach this subject with any future girlfriends of mine? Tips on how to go about assuring a new SO that my ex is in no way a threat? Advice on when to bring it up?

Can you give me the gist of the text in a nutshell?
<bot>: Working with an ex, comfortably friends, need advice on how to make sure that this does not cause problems in the future.