Boyfriend turned gay

Hi, i feel like i have to share this shit that happend to me (30). My Boyfriend (22) of 3 Years told me 2 months ago that he is more into guys. First he commited hes bisexual and has to figure things out for him. He told me that he loves me and wants to stay in this relationship. We talked a lot about his feelings, i tried to understand and gave him the chance to try it with boys because i thought it would be a sexual thing. But after a few weeks he told me hes sure gay and more into guys. I cant believe he did this to me. A friend of hitold me he knew this about a year.... so why didnt he told me single word about this. I feel so betrayed, even if he was honest and didnt cheated with a guy. Why was he living this lie?we now have no contact anymore and hes doing his things...and i feel like the most shittiest person on the plantet. i feel raped in sexuality like in my brain. i was living a lie and question everything what happend in this relationship. i really dont know how to get over this? He was teh one and only and i couldnt even expect that something like this would happen... ther were no fucking signs