sorry this is so long...so i love my boyfriend with all my heart i couldnt be happier with…

sorry this is so long...so i love my boyfriend with all my heart i couldnt be happier with him...with that being said every relationship he has been in hasnt been the best so he always accuses me of cheating which i would never do to him because this man is my whole entire world and that is no lie i want to marry him one day he is my best friend...now this might seem wrong of me to do but i go through his phone yes when he is awake and yes when he is sleeping i found him looking up his ex gf on facebook who he says he wants nothing to do with and says he hates her...but i cant help to think that he is talking to.her and deleting the messages before he gets home from.work...ive been thinking of ways to bring it up but i dont want to start anything if its nothing 😢😫 im just looking for some advice on if i said.bring it up or not. if you decide to say rude comments then you will be blocked i dont need it thank you.