dating somone is your boy friend and girlfriend as of dating is simply going steady and your just testing the women or man out to see if he or she is right for you
Really all you can do is crush because you would'nt want to try and mess someone's relationship up that's just starting drama so just give a flirty signal and maybe he'll catch feelings and you just...
You might take it personal, but I wouldn't sweat it. Maybe it was one thing you did. Ask them why you remind them of the person, see if you can fix anything. But do not change who you are for them.