I Really Dont Know How To Feel

My boyfriend and I have known each other since I was 13 and he was 14 we wasn't going out then he wanted to but I didn't so we just stayed friends we dated when he was 19 and I was 18 it didn't work out so we decided to stay friends  but now some odd years later he's 21 and I'm 20 and we are dating again it's going really good but I think he still in love with his ex we showed each other pictures of our exes and then he showed me a picture of his ex and he just started glowing blushing smiling all of this other stuff don't get me wrong she's a beautiful girl but I think he is still In love with her I have no clue how to feel at this point I just really want to break down and cry should I message her to see how she feel about him and if she feel the same way just let them two be together or should I just leave it alone 😢😢🤷🏽‍♀️