Ex boyfriend has a ring for me?

So I’ve been staying at my ex’s house ( who I have a child with ) for the past few nights bc I had issues with my mom . I was helping him do laundry and I noticed a ring box in his closet and a little letter underneath it . Me being nosey I open the ring box and it’s been the one I wanted for years . The letter was talking about how much he loved me and how sorry he was that he messed up our relationship.

Little back story :he cheated on me when I was pregnant and then got with the girl he cheated on me with and no she’s pregnant.

He’s still with this girl.

I really do still love him and not just bc he has a ring for me b. Thats the reason I called him when I had no place to stay but honestly don’t know what to do at this point .

Update: I asked him about the ring and the letter this morning , he told me he was going to give it to me in a couple of years. I told him that’s messed up that he has a ring for me but is dating a whole other girl, and he just went on about how he doesn’t really love her blah blah blah and how he only is staying with bc she is having a baby’s with him and like he’s just honestly a mess I love him but I just can’t be with him and I told that to .

So I messaged the girl and I told her everything and she doesn’t believe me , of course I even took pics of the ring and the letter , and she called me a lying bitch and I’m just jealous of her and him , so I’m letting her do her and she with a cheater and sucks for her lol