Im dating a very good man who id like to get married to someday how can i improve my chances of marriage?

Tha father of my daughter ped away 2 years ago & i battled to get back in the dating game until i met this wonderful guy that im with, i have been misbehaving when im drunk and am worried that he might have written me off even though he is still with me, could i be right or do i still have a chance to make it up to him