Break-up

I just got broken up with for the first time and i'm in so much pain. I thought we loved each other and everything was fine for over 6 months, and he was so sweet to me all the time until he started messaging me a lot less this past week and finally texted the breakup message. He claims it's because we are too different and he thinks I'm a lesbian. I identified as lesbian for many years until dating him, and now I think I'm bi. I thought he understood since he is bisexual as well, but I guess he doesn't. I'm in so much pain. I loved him so much, and he helped me get through my depression, and now I know it was all a lie. he doesn't even have the guts to talk in person or call me, he just texted me and left.