He’s losing interest in me ?!!?!

so i have this boyfriend and we’ve been together for like 5 months and everything was perfect in the beginning like i used to think it was too good to be true, but now he just acts different..like i feel like he doesn’t love me anymore but i don’t know if i’m overreacting or not but i feel a change and i don’t like it at all and idk what to do 😐