Heartbreak

Is anyone dealing with a heartbreak and how did they get through it? What are some tips to letting a person go? For a whole year , my ex been entertaining his exes. It go the point where he started deleting convos with them & his friends just so i won’t find out. One day he used my phone to log on his social medias & forgot to log out. Of course, i took the advantage to look though it. We were layed up in the bed together right after we had sex & his ex texts him ; he gets up goes to the bathroom to reply & then deletes the convo before entering the room. Another thing, We don’t even have each other on social media so i realized he would post for females attention. He literally posted one day “ if i heart your photos that means I love you “ ( keep in mind we don’t have each other on social media) and when we do he doesn’t even post nothing like that. I saw him hearting all of his exes stories/pictures . I asked him to delete his exes & he did but then i seen he was still searching them up without even following them! I immediately was embarrassed & they were probably laughing at me. That’s when i came to my sense & realized he did not love me. No person that loves you would ever put you through that. Why do you want attention from them? Why do you want to keep up with life? Does he not love himself? When i confronted him about it he was more focus on the fact that I had his password and wanted to go through my phone and he barely even apologized. I’m so mad at myself for putting up with this & dealing with someone this whole time that never even cared. He is so whack for not keeping it real with me but lesson learned.