What do you do if he is not that into you anymore?

Well, firstly if he is not that into you, i suggest that you hang out with your friends, dont listen to depressing music, and try to move on. This stuff is hard, but you just have to accept that he doesnt want you anymore. or another alternitive, speak to him, take a trip with him, have a fun day with him. he might change his mind. hope this helps ! and goodluck