Honestly dude, if you're cheating on her, you don't love her. I've been in love once, and i've also been in an LTR with a chick i did NOT love. The difference is HUGE. There is no way, just no way you can cheat on a chick you TRULY love. Believe it or not, i literally lost ALL sexual attraction for chicks other than her. It's an unbelievable feeling, but that's what happens. So my advice to you is: end the relationship, as you've damaged it and yourself to a point where it has no future. Even you stop cheating now, you'll feel guilty about it for the rest of your life, and the relationship will never be healthy. This is beyond repair. Tell your chick what a cheating, lying sack of sh1t you've been and let her dump you. Once that's done, get to work on yourself and become a better man, one who wouldn't cheat. Only then, find a new gf.