My bestfriend broke my heart and he wants to be friends again what do i do?? :/?

My best friend stu broke my heart. I liked him for so long but i ignored it. He had told me he liked me to but it never showed. Me and him got really intimate twice and the first time he said it was a mistake and the second time he told me he wanted to be more than friends but didn't want to hurt the friendship. He dated and dated girls and i was always there to fix his heart. I always comforted him threw everything. He got really mad at me tho at the end of school and he said he hated me. I was crushed. I did everything to get his attention, but after 2 months of not talking he text me and everything was once again okay. Well after that we kept arguing and it was getting frustrating. He text me one day saying "I LOVE YOU!!" and i was extremely happy but when i asked if he ment it he said i was just joking and i was once again crushed. Well i went out of town and we talked about everything(he made me) and i had told him there was i time i was pretty sure i loved him even tho i still did. Well me and Stu got alot closer after that and it was all good. Then he text me telling me he thought about everything and he wanted me and i asked for some time and i eventually said yes, everything was going so perfect in the beginning, the things he said and did, he made me fall in love and yes i told him and he told me he loved me, when school started back up everything was fine till he talked to a girl at lunch(his ex who broke his heart) and left me all alone. So i obviously got upset. But before the end of the day we made up.but that night..he was so distant. Well the next day he was with her once again and I've never like this girl ever but i sucked it up so i could be with him. that night he told me some pretty bad thing and he didnt even say "i love you" back. The next day i didnt go to school due to an illness that i have and i was actually in the ER that day, i told him and he called me at like 6:00 cause he has ROTC(army stuff) and said he was comming well he came and he apologized for everything and once again i THOUGHT everything was okay but the next day at school people asked if he was dating me or the other girl and it hurt and everyone was telling me they saw him and her getting a little to friendly but i ignored it. friday she saw us holding hands and literally cried so he went to talk to her and when he came back he broke up with me. he broke my heart. he promise i didnt have anything to worry about. he threw everything away he even threw stuff away in front of me. He says now that Im the only one he wants to be in a serious relationship with but im too dramatic. He text me today telling me he had a great day because he found out that the two girls he wants to date like him. He broke my heart and yet i still love him..what do i do?