My bf left, won’t have signal, I’m worried

My bf left to the airport rn, he’s going to Mexico, because he’s going to visit his family,He hasn’t seen them in a year. He’ll have very little signal. We’ve been together a year and a month and it has been kinda rocky, with him doing stuff behind my back multiple times but he stopped his childish acts and has truly changed. Yet I am still not over everything and I’m worried he’s going to hurt me behind my back again and I won’t even know about it. What do i do? How do I keep busy? How do I keep shitty thoughts out of my head? 😣 breaking up is not something we want. But I’m getting a sick feeling because I’m so scared of getting hurt. PLS HELP 😔