Gay men going straight??? HOW?????

My boyfriend just left me because he says he is straight now. After 21 years of being gay. And after kissing boys on the playground. And after being with a woman, and telling me it was disgusting and he had to close his eyes. He does have a straight nature. He was in the army, not cleanly, stuff like that. But he is a wrist flipper, and even wheres lip gloss and has a switch when he walks, LOL. Wears pink. But anyways, he tells me he is straight, and cant be with me anymore. Next day, he has a girlfriend he met online 3 days prior. seemed like he flaunted her a bit. But he told me they are in luv now, him and I met online, and he has dated a LOT online, and fell in love with a lot of people online. Him and I have met several times, he would stay with me. But he came here yesterday to pick up the cell phone he had bought for me, and as he was hugging me, he got an . He told me it was diet pills. He left, and looked so sad. Should I give up or wait for him? Is he just confused?