Long story short: until 2 months ago I was in a long distance relationship and I am still fairly heartbroken and struggling through it. So needing my friends and family round me right now.
Leaving that aside - when I first met this co worker it was a thunderbolt moment, I remember meeting him so vividly in a way I don't with most people. For a while I really struggled because of the chemistry & having so much in common - he was the first person I felt this way about since meeing my boyfriend 2 years previously (in hindsight it highlighted things going wrong with now ex).
By he has a girlfriend and thinking long and hard about it, I re-directed all my attention back to my boyfriend and was friendly with the co-worker and nothing more. Now, several months later, we have split up. I didn't tell my co worker this.
The other day I told the co-worker I was considering leaving the job, or at the very least, heading back to my home city in the UK to regroup for a few months. He looked sad and said he understood that I wanted to be with my 'boyfriend'. When I told him we were no longer together, he looked a bit too happy for my liking! He then said he understood if I needed to heal for a few months but that he hoped I'd come back after. The truth is, I don't know if I will, but would like to keep in touch with him anyway.
So, I respect his relationship. But I also appreciate and value the frendship that has grown. Would it be wrong of me to ask for his number to keep in touch when I do leave soon? Or should I just leave it altogether?