What should I do?

This might be a little long but here goes.

Back in the summer of 2015, me and this older guy became friends. He was 20 and I was 17. He was funny, kinda cute and he was older so of course I thought he was cool. One night after work I went over his house and- well, we became friends with benefits. It lasted a few weeks before I realized I had caught feelings. One night I had told him how I felt and he said he wasn't in the place for a relationship and I should basically forget about there ever being an us. We continued hooking up until my parents found out and I was grounded for a while. Not long after I got grounded, he apologized for everything. But then he completely ghosted. I was so heartbroken, I genuinely liked him, but my dad was sick and my family needed me so I grew up and healed myself and not long after I started dating a new guy.

Not long after I started dating the new guy, the ex friend with benefits contacted me wanting to apologize about everything. I told my boyfriend about it, the ex and I texted back and forth for a while until he started having inappropriate conversations about past sexual things we did and the feelings he had for me. I cut things off but since then he's contacted me again about three other times. All in secret. He has a wife and the marriage is rocky, (he's told me so in conversations). He's off somewhere in the Navy and stopped texting me when he got deployed after finishing basic training and such. But he's still tried talking to me a few times. My boyfriend knows and I now have him blocked. But what do I do? He was once a really close friend that I got along with extremely well. I had feelings for him and he hurt me. Even though he apologized for what he did and even confessed that he wishes he had a chance to date me, I can't help but still feel a bit bittersweet about him. He was a really close friend and I always enjoyed talking to him. Sometimes he tries to add me on snapchat or text me. I love my boyfriend dearly and with all my heart but my ex friends with benefits I feel like will always be that one that got away. How do I get over this? Help!