Hello Mermaids101, welcome to PC! I hope you find your time here to be of benefit.

Unfortunately we cannot really tell you what to do...you'll need to look inside yourself and decide what it is that you want, because that is what truly matters. I personally could not stay with someone who cheated on me, but other people have stayed in relationships where cheating occurred and have been able to make them work.

I can understand the feeling that breaking up would mean 4 years of life wasted...I recently ended a long-term relationship (almost 3 years) and felt the same way. But I try to think of my past ended relationships as having brought something to the table, even if that is just lessons learned. Besides, would I have rather "wasted" 3 years of my life, or the rest of my life? The choice was easy for me.

Whatever you choose, I wish you the best. You deserve happiness and a loyal partner.