Bad relationship ... HELP !

So Iv been with my SO for just over a year now and we have just got a house together but he stays out all night almost every night I know he's not cheating but it's really hard when he isn't home all I can think about is him I get anxiety because I never know when he is gonna come home longest has been 2 days I really breaks my heart and he always has an excuse as to why he was out we both work full time never get to see each other I love him to the moon and back breaks my heart even thinking about leaving home but what should I do ?