If you know you can cope, go ahead and marry him.
But let it be on record that you saw the signs, don't come wailing and lamenting when you get married and dude becomes worse.
Have it at the back of your mind that he will never change.
My little sis is regretting her life now, her husband sleeps with anything and everything. Sometimes he doesn't come home to sleep. She is living like a spinster.
Meanwhile just like you she saw all the signs and people warned. She said they were jealous, hmm.
So what I am saying?? The decision is yours to make. If you think the guy is the best thing that ever happened to you and you can cope, go ahead.