Dear Ryders need your advice

My boyfriend of ( eight years refuse to leave his wife ,he has  been promising me that he would.

He been lying to me all this time….

First he told me they don’t sleep together on the same bed  however I just found out they just had a new born son. (how did that happen)

He take care of me and help with everything I need, but I can’t with the constants lies.

I want to be happy.

Please help.