So ive been with my boyfriend for almost two years. We basically lived together from the start, since we worked together and always stayed with each other. He decided to go back to college about 5 months into our relationship and we made the distance work, it was only an hour trip to visit. Ive always been rather insecure, so cheating was a concern at the back of my mind even though he never gave me a reason to worry. I would drive to see him 1-2 times a week at least, he would occasionally drive to see me as he was able. After he finished his year, he lived with me over the summer and now we've moved in together by his school so he can finish the last year he needs. Recently he seemed a little distant. I felt like I never saw him anymore, but no schedules had changed. I expressed this feeling to his and he said his finals were coming up, so teachers were cracking down and a lot of his work requires school equipment and software, which is true, and he apologized. I did the regular curious snooping through his Facebook page and whatnot and didn't see anything too crazy. Then about a week later I get a Facebook app request for "badoo" from him. I didn't know what it was so I clicked it and it took me to the app store for a dating app, similar to tinder. I asked him why I got the request and he said "I don't know, maybe because it thinks I should date you?" obviously, that is a bullsh*t answer, but I didn't want to seem as crazy as I felt. Christmas <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> comes and I can't shake the feeling he's hiding something, so I check his phone while he takes a shower and I immediately find tinder on the screen. Looking through the app, I find dozens of conversations hes started with different girls, some from his classes, asking them to come over with no underwear on, hitting on them, saying things that he's told me before. I didn't look through them all, but I saw them go back from two days prior, to September. There were plenty more. I didn't want to make any rash decisions, I was on my period, so when he came out of the shower I locked myself in the bathroom and talked to my best friend and cried. He didn't know anything was wrong yet so I fixed my makeup and got ready to leave. He realized my entire demeanor had changed so he asked what was wrong and I broke down and asked why he would hurt me and admitted I looked on his phone. He was speechless for the first time ever. He almost started to deny the whole thing, then took his phone out, deleted the app, and promised it would never come back. Ever since this, he's been talking more about where we're going to move after he's finished with school, what our future kids will be like, just trying to plan our life together. I want to forgive him and forget it ever happened but I keep going over those messages in my head and it hurts every time. Will it get easier with time? Am I going to regret my decision either way? I'm just lost right now. Please help!!!