How can I do?

Understand that if you pursue this, and he ends up leaving his wife and child for you, you will never feel secure. It will always be in the back of your mind that he could do the same to you one day. Get on with your own life, leave him be, and if (and only "if") it meant to happen, you will meet again when both of you are single.

Get as far away from him as you can. Don't do anything that could end up hurting 4 people (including you). I'm betting that there is somebody else out there you could love.

how did you get to know this man? Did you know about his family when you loved him? You are at a loss in this situation my friend, he is married and with a daughter... if he tells you he loves you... you ought not to believe that.. how can you trust a man that would betray his wife? He might just want to get something from you and will possibly leave you when he is done with you.

Leave him, if you really love him.

well...if you really love that man and he alos equally loves you then....i think he will leave everything and come to you.