No sex anymore

I havnt had sex with my SO on two months. Since school started I see him maybe once a month, he lives less than 10 mins away. We sext a lot, and I constantly send pics. Yet he’s always “too busy”. Last week I literally told him I was crying cause I missed him and wanted him so bad and he just said he was too busy, even though all week we talked about him coming over. We’ve known eachother two years and this year our sex love is no existent. I’ve gotten to the point where I’ve asked him f he still wants to be together and he swears up and down he loves me and want me but... idk anymore. He constantly is breaking promises. He graduates from his masters next month and I’m still finishing up my bachelors, so I have one year left. My test is if he still stays after that then it’s real but if not... I’m done

EDIT:

I’ve noticed a pattern that on days he plans to ask something crazy from me or ditch me he’s really super nice and loving, like talking about our future and stuff.

I call him SO because I get mixed signals on what we are