Dear pub readers can friends be lovers

''I have this male colleague at work and we are very friendly, we see and chat with each other everyday. We’re both single and so far, the relationship has been purely platonic – except for once or twice that we have kissed when slightly tipsy.

Lately, I’ve been having sexual fantasies about him. I’m not sure he feels the same way and I’m worried an affair might ruin our relationship. How do I make the first move without making a fool of myself.''
Over to you guys.