Search Results: pick the best girl

One of my friends is hooking up with my boyfriend's best friend (let's say my friend's name is Amy and my boyfriend's best friend's name is Yale)
My friends came over last night
Then Amy told me that my boyfriend told Yale some things like:
- My boyfriend said that my best friend is hot and that she looks like she gives good blowjobs
- My boyfriend said that I'm crazy and clingy
- Whenever my boyfriend calls at the gym and says there's no girls, there's actually some girls in the gym (so he lied to me)
- My boyfriend said that we have "vanilla" sex
- My boyfriend has always wanted to break up with me
I got so angry and so I told Amy to call up Yale
And I recorded the whole conversation and Yale admitted to everything and it was the truth
So me and my friends drove to his workplace
And I couldnt contain my anger
I told him off so badly and that we were done
I kept telling him all the things that Yale said and played the recording back to him
My boyfriend didn't even try to explain anything and he kept denying most of it
He said "yes I've said about your best friend but that was ages ago when we just started dating"
I told him "just break up with me if you're not happy with me"
He didn't want to break up but he told me "go home because I'm working right now, I have to go back, I will talk to you after"
I got more pissed and told him "dont contact me, I'm done with you, Im deleting my facebook"
So I deleted my facebook and we all went back to my house
Few hours later, he messaged me saying "I finished work now"
And I never replied
Today, I've never heard from him
Apparently Yale tried calling Amy but she never picked up
So he messaged her saying "why did u tell her that? He said it ages ago, and I'm the one that called her crazy, not him. Now he's worried and scared to contact her"
Should I end this relationship?
I am soo angry!
We've been together for nearly 3 years
Our families are so close to each other and we've gone on vacations together
I don't know what to do :(

Ok, I am a total nerd. I play Dungeons & Dragons. I LARP and cosplay. Volunteer and work at Renaissance Fairs. I am an active gamer, from Battlefield to Mass Effect and Skyrim and Bioshock and everything in between. I graduated valedictorian from my class. I was in the army for a short period of time, I race cars on the weekends with my family. I am a total Nascar, NFL, UFC and NHL fan. Yet, every boyfriend I've had has either cheated on me or dumped me. So... Is it just my personality? I always try to be the best girlfriend I can think of being. Bringing them home soup when they sick, jumping every time I text. Driving to go pick them up because they don't want to waste the gas to come see me. Am I just to gullible?