idk what to do..

I am a 17 year old girl and my ex-bf dumped me dec.22 and honestly this hs been the hardest thing in life we had been dating for around 2.5 years and i lost my virginity to him. I am currently in a very bad state and i need help trying to forget him he was so sweet and caring and very supportive he just claimed he didnt feel the same but after out break up he said hed always be there for me but idk what to do...