I think the most important thing is to understand that you don't need a man to be ok good & fine. You may be very much happier alone than if in a relationship? But leaving one man for another will cause you stress and worry about the decision.

The major key is that this other guy became unavailable when you said you wanted to be with him. This kind of man you can never rely on, and I would say the same about a woman too so I'm not man bashing at all.

I really hope that things smooth out for you and that you make the decision based on what is best and right for you.