i miss him so much

my now ex broke up with me 17 days ago every single day since all i’ve wanted to do was lay in bed and cry we had been together for 6 months and the reason he ended things with me is because i was very shy and awkward in person i facetimed him every night and would text him all day long but than when we would be in person i would freeze i hate myself for this because if it wasn’t for how stupid i was we could’ve still been together when we i truly care about someone i get so quiet and i don’t know why i think it’s because im scared there gonna change there mind and not like me anymore. he’s already talking to a new girl and has no care at all the girl is 2 years younger than me my ex was one year younger than me so there only one year about but i just feel like rid already replaces me with some younger girl and i just feel so worthless ands that every complete he’s ever given me was just a leis and that he’s gonna say it all to her now like i can’t even belive i can’t call him mine anymore i want to throw up thinking about how he’s gonna call another girl his girlfriend soon enough every few seconds im checking my phone to see if he has snapped me back or texted me he snaps me every night a few times ms and he keeps sending me mirror pictures his new girl keeps texting me i thought we were friends and she was asking me if i still liked him i thought she was asking as a friend so i said yes now i found out that they liked eachotwr and she was trying to find out to see if he liked her not because she cared about me so i also feel betrayed this is the longest relationship i’ve ever had and i really thought we were gonna last i love every single thing about him and i don’t know how to move on i need help