regaining trust

Fatima

My boyfriend and i recently got back together after not being together for about a month and some change. We were still in contact during our break and he was lying to me about who he was with even though i had given him no reason to lie to me (we weren’t together so he shouldn’t have had to lie to me if he was with a girl right??! anyways) but we ended up getting bsck together after we both did a lot of thinking and talking and i’m trying to regain my trust for him again. I like to think that he wouldn’t lie to me and go out with other girls if we are in a relationship because he’s never proven himself to be a cheater and i want him to go out and have fun with his friends but part of me is like :/// what if he’s lying abt who he’s with? what if he’s not where he said he was?? what if he’s playing me???? how do i get over this? he’s going to a party tonight and its the first time he’s going to one since we’ve gotten back together and i’m very uneasy about it. i’m trying to distract myself and be supportive like i was before but he lost a lot of my trust since the breakup and it’s hard for me to regain my trust for people :/ i also don’t wanna bring it up because tbh … i did stoop down to his level and purposely lied to him about something small when we weren’t together so i don’t wanna be a hypocrite. are there any good tactics to regain trust for somebody?