['I was dating someone else when I met the man who is now my husband. I thought he was just going to be a friend, but I eventually developed feelings for him.', 'Wow. Did the other person know what was going on?', "He didn't, but when I broke up with him I let him know. I never acted on my feelings until we were broken up."]
Well that's good. Sounds like it all worked out pretty well.
When the guy I'm now married to and I met for the first time I was actually dating someone else. I thought that my now husband would just be a really good friend to me. I stayed with my ex-boyfriend for a while after, and even when I knew I wanted to date my now husband I never did anything to betray my ex.