<human>: Can you summarize the given text in a few sentences?

I was best friends with a girl since kindergarden, our friendship lasted about 14 years. She was truly like a sister to me, we did everything together, and my family took her everywhere with us. I ended our friendship when she came clean about having an online sexual relationship with my high school boyfriend of a little more than four years. She came clean because he was black mailing her. They were both 16-17 when this online affair happened, and we were all 18-19 when I learned about it. I cut both of them out of my life, including her then boyfriend who had a few rude words to say to me about my choice to cut her out.

Finding out about my friend and (then) boyfriend was really tough on me back then, and made me very insecure. I had a lot of problems with close female friends and introducing them to my boyfriends after that situation. I have gotten over all of it completely thanks to my amazing longterm boyfriend. My boyfriend now is the most comfortable I've been with anyone since my ex-friend. 

From social media I believe she now has a new boyfriend as well, and my question is, should I contact her? I have no idea what I'd say but this has been in the back of my mind for a few months now. I have almost no women friends and do miss a lot of the good times I had with her. I cannot decide if what she did was just because that is who she is and will always be, or because she was young and dumb. What would you do?
<bot>: Cut contact with friend of 14 years after learning about her computer relationship with my high school sweetheart. Am considering contacting her.