he sent him pics!!!

I'm making breakfast for me and my boyfriend of 6 and half years and decided to quickly look on my laptop (I'm desperate for extra job to pay for my driving license) and one of the links took me to Facebook and it show that my boyfriend hasn't logged out so I just thought to look at the messages (he has been sleeping a lot on the couch recently) and I see "you wish x" from a guy that we both know.. But he is transforming to a woman(hormones etc). So I looked at more of their conversation and I found too much.... Basically 3 weeks ago they had a conversation and they were talking really dirty... And it looked like it wasn't first time... My boyfriend even sent him pics... Of his dick in our living room at 3am whilst I was sleeping... I'm definitely breaking up with him - I'm just going to do it smart... 

As soon as possible I'm going back on pills... Not sleeping with him... I'm disgusted.... I even bought ovulation tests so we can get pregnant easier... He ruined 6 and half years of relationship... And I can't hold my tears back ;(

Edit : took about 10 photos of that conversation and hide it on my phone. I'm going to use them.

My plan is to simply tell him to pack his shit quietly and move out if not I will tell everyone... (That guy lives in the same street as half of his family)

Edit2: we live together, have A dog, it is not that easy just to break up on the spot.