Relationship / marriage

2017 i met a lady in school, we dated for one year before people started telling me that she is married with a child. I asked her she denied it at initial time. After sometimes i asked her again which she accepted to b true, but she said they were having issues. Since then my love for her wax cold but i couldn’t quit the relationship. After school time, distance separated us. But we talked on phone sometimes even when she was in her husband's house. We met again she told me she has divorce her husband cos of want she was facing in his house. She wouldn't let me go, we continue the relationship but my mind was nt at rest. I told here several time how my mind is always judging me of dating somebody's wife. Last year she got pregnant for me and delivered a baby girl. Now we live together, but i dont have rest of mind, alwaz thinking about the sins i committed with her in the time past. Anytime i thinking of marrying her legally, my mind keeps judging me. Sometimes i think of leaving her to go and start a new life. I dont just know want to do, am confused. Please i need a spiritual advice.

2007 i mean not 2017