Should I stay with him?

It doesnt matter that you and him werent serious in the beginning of your relationship (who is) what matters is YOU and HIM were dating at the time he slept with his ex. Thats cheating. My ex used all the same lines on his gf when he cheated. Actually he has denied everything which only goes to show what a coward he is. At least your bf came clean, but that doesnt justify his behavior! He obviously wasnt over his ex yet when he started a relationship with you. 2 mos. is pretty fast to fall in love with one another. Not many people get over an ex quite that fast.

If you stay with him, you’ve essentially taught him that he can sleep with somebody else and you’ll take them back. No one here can tell you what to do..thats your decision, but you are definitely having doubts on how you feel. Even if you manage to get past the lies, and the heartache, a cloud will always hang over your relationship. You’ll never truly feel cherished, or completely loved. I guess if you do decide to stay with him, always be on your guard, and NEVER let him sweet talk you into believing something your heart knows isnt true!