Confused ...

So me and my boyfriend been together for 2 and a half years now it hasn’t been easy we broke up last year for a little I wanted to move on I ended up meeting someone else and I slept with them but realized I didn’t want to get into another relationship and me and my boyfriend was still speaking with each other I didnt want to get back with him but I felt I should tell him that I did sleep with someone else and so I did and he was really hurt and he just wanted to get back with me so I eventually agreed and decided we should work things out because I love him a lot. We got back together then this past April we broke up again and have been broken up for two months and we both thought that this was gonna be real this time that we was just gonna move on and we barely spoke and didn’t see each other a lot in the past two months. Now the past week we got back together because we love each other and we just want to make it work so I moved back into our apartment and we been together. The other day he told me he slept with someone when we wasn’t together. Of course I’m hurt by that but I did it before too last year when we broke up so I can’t say much and we was just gonna work things out. Not gonna lie can’t seem to get him sleeping with someone else out of my mind but what really bothers me is he has not had sex with me like we haven’t had sex in over a month and we are back together and it’s like he don’t want to have sex with me at all he says he’s tired which can be the truth but it hurts the last person he had sex with is that girl and it’s like why isn’t he having sex with me he’s still very affectionate with me though we cuddle and kiss and all that but he hasn’t had sex with me that’s hurting me a lot . Should I be concered? Or maybe he is just tired ? Idk what are your thoughts ?