Tell me what i should do. PLEASE!?

i was bestfriends with a guy, who when i first saw him i felt something special about him. we both were in a relationship with other people and we found out we liked eachother. but before that we were BESTfriends and our families were good friends and knew we liked eachother and wanted us to date. we talked a little, like a couple would but we wouldnt break up with our bf and gf because we didnt want to hurt their feelings. i ended up bein brave enough to break up with my bf because he wasnt maturre and just didnt want to have time for me. the guy i liked still wouldnt break up with his gf but whenever another guy would even remotely try to talk to me, he would get all pissed off. we didnt talk the rest of the summer then one day he called me up over the summer and explained that he missed talkin to me and stuff. we got invited to a summer party and he flirted with me and hugged me and finally realized he needed to break up with his gf because he didnt really like her anymore and that have waited too long. (a year) then we eventually dated two weeks after their break up and we had an amazing relationship. but we hung out as much as we could since he was so involved with his sport. we dated for half a year and found out that we needed a break because the part of the year coming up was gonna be stressful before highschool, when he would tryout for the sport. after we broke up i was heart broken and rumors spread and when we heardd them we started talkin trash about eachother. i cried every night listening to our song and sad songs, snuggling with the bear he got me for my bday and holdin the jewelry he got me and i even stayed up by myself at my friends beach house for 6 hours writen him the LONGEST letter. i later on saw that his ex got her braces off and got all spiffied up and he started walkin with her in the halls and standin with her. then when people would ask about them, they would say they were just friends. i decided to give him back his jewelry because i didnt need it and i didnt wanna see it. the same night i saw him and his family at a school reunion for our younger brothers and his family was huggin on me and talkin to me. his mom wants me to help her out with all these sports activities and stuff cuz she says she loves me and that her daughter whos on the team loves me too. but he didnt look at me or talk to me the whole time. i caught a glimpse of his messages and read him and his ex's convo and there was a part where she said she was goin to the beach and he said you go gurl and she said you know it(; does that mean anything or am i just assuming things? but then he was freakin out that i was readin the messages...so i mean, that could mean something. but idk what to do. im sitten here listenin to sad songs cryin still after 3 months since the break up. please tell me what to do!