How to not feel like shit?

Hey reddit, I am here to vent and ask for help. This is my second time trying to write this because there is so much shit. First off, I was raised and still am (14) by a very conservative christian family. I used to be a *straight* christian for 12 years until I started to doubt god than I became an atheist. Still *straight in this timeline*, but I had a lot of gay thoughts but no attractions or crushes on guys. It was not until 13 years old I discovered gay porn(like 8 months ago). Of course I doubted being gay and kind of hated myself, but that is not even the main reason I am writing this post. A few days ago I started a relationship with a 16 year old on twitter. We talked a lot and stuff. Things advanced and the guy seemed great and had an awesome personality. I liked him a lot and, I imagined he liked me too. But today he said he was talking to his boyfriend while we were talking... What? Then he apologized and did the same to his boyfriend. We resulted to being friends but I felt used and manipulated. Its hard to display my emotions in this post and the way he acted. But I just feel terrible and I keep getting notifcations from his twitter and their all about how much he loves his boyfriend. And anytime I think of something gay related he pops up in my mind. I have no one to turn to, even my liberal brother thinks gays are sick and a sin to god. So I'm turning to you guys.