Is it normal if i think i'm comparing myself to my ex?

I'm scared that the way my dude looks at me is how I used to look at my ex; not good enough and not my type. I know it sounds bad but that's why I let him go because he was not for me even though he was really into me. I just said he would be a great bf but for someone else. Now that I have been talking to my current bau, throughout this whole time I have felt like I'm not good enough for him. I think for sure part of it is me having low self-esteem because he seems like he's more on top of things but also, sometimes he makes me feel like he wants me to be a certain way. I try but at the end of the day, he still tells me how much he's crazy about me every now and then. The difference between me with my ex and me with my current guy is I wouldn't front and lie to my ex about how "crazy" I was about him because I wasn't. Why would I lie? In contrast, my dude tells me how crazy he is about me although, he'll make me feel like crap like I made my ex feel. So this is usually where the difference is between girls and guys. I think most girls won't put up with someone they don't genuinely want to put up with. The "player" stereotype comes from how guys will still put up with someone they don't genuinely like just to play around with them and keep them around. Rather than him letting me go like I let go of my ex, I sometimes feel like he will tell me those nice things to keep me around especially because he should know how crazy I am about him. So idk if I'm going through karma or if its all in my head knowing what i put my ex through. It's like I need to realize they don't know each other so I can't just compare myself to my ex like he's the only person on earth. If it is karma, I totally deserve it even though, I would hope he would give me the chance I couldn't give my ex. I know if I was still with my ex, we would be leading each other on and it just wouldn't be fair to both of us. But maybe my dude right now has more strength than me and sees through my flaws. I would hope so because I am probably just as crazy about him like my ex was about me...if not, even crazier.