Should I give up all hope? I really love him still!?

Me and my ex were first loves first kisses, and we lost our virginity together. b4 that though, we were best friends for about 2 years and dated a total of 2 1/2. We started to argue and grow apart when we moved to different colleges we started to have less time for each other and he said he thought he was falling out of love with me but didnt know so we broke up ultimately just in case. We had a really tough breakup where i decided we couldnt speak although he wanted to stay friends. Its been that way for 7 months. until i saw him the other night in his community mall and i ended up spending the night with him. we connected again instantly we laughed hugged played, and kissed both wanted to have really bad but we didnt we watched a movie and cuddled instead. He looked through my phone and saw this guys name i had been texting and all through the night he kept bringing this guy up. Theres this girl he has become close to but they are known to be like best friends right now and nothing more, (he says) she kept banging on the door and calling his phone asking was he ready to go he said no that i was spending the night with him & i was nosey so he didnt want me in there alone. The next morning he ditched her again and we slept in instead. He still kept bringing up my guy friend over and over jokingly and kept bringing up things that happened while we were together..He hugged me and kissed me goodbye and then the same night the girl that was banging on the door he put multiple pictures of her everywhere on his twitter (me and him follow each other) and i got so jealous because i still love him.but i didnt say anything about it bc i figured he really likes this girl. But im so jealous of them i feel i lost hope in getting him back because he doesnt even text me anymore. Finals for school are going on so that may have something to do with it but idk.