Long distance relationship

Me and my bf have been in a ldr for 2-3 months now ans we have been together since a year we both are 18 but ever since we've started long distance i feel like our relationship has been falling apart we dont talk much i always try to give him time but i dont see the same from him and i get anxious and overthink alot so i keep thinking what if hes losing interest or cheating on me and we met after 3 months rn and i checked his phone and told him i thought he was cheating he got mad that i dont trust him and since then after hes gone back hes been a bit distant from me he dint eveb text me once he reached and idk i havnt received a text im getting rly anxious idk what to do