i (f20) found out my boyfriend (m20) cheated on me at the start of our relationship. does the pain ever truly go away? is moving on posssible?

hi. apologies for mistakes as im unsurprisingly not in a good state of mind. as per the title, i found out my boyfriend cheated on me around two years ago, when we first got together. we are long distance, and a few months ago he stayed with me over the summer. while i was home alone, i went through his texts and saw a girl's name very far down. i checked and yeah, my worst fears were confirmed, nudes and everything, all while we were together. the messages were sickening.

it's been some time since then but i'm still suffering badly. we've had many talks about it, many boundaries were set, and i know he would never do that again. but it still hurts so much. the fact i trusted him so much yet he was behind my back speaking to another girl like that, i just can't get it out of my mind. if anyone has been in a similar situation, please share your experience. thank you