Caught my partner of 6 years cheating! Help!

So just last week I found out that my partner from 6 years was cheating on me with 2 girls. One of the girls was a girl we knew from high school and we'll she was his "hoe" before we even got together. We started dating in January 2009 and been together since. We have 2 beautiful boys together and I'm absolutely destroyed! I'm really confused and don't know what to do. I don't know if I should give him a second chance 😔 I'm posting a picture of the girl from high school and a picture of me. Is she really that better than me??? I'm the one that says, "Hello Ladies"