Dating after break up

Hello all,

I’ve (28m) started dating again after some time ( few months) had passed since my gf which I thought I would end up with left me.

I’ve met a new girl and went on a few dates and we have amazing chemistry like I never had before. There are some things that bother me though.

Even though I really like her and have a little bit of feelings for her, she is not nearly as beautiful as my ex. If my ex is a 9 she is a 5.5.

That being said the chemistry and connection is great but I’m not that attracted to her, the sex is amazing but I don’t see it really in the long term, but I keep saying to my self that maybe I would change and I can find her attractive later on ?

Anybody experienced this ?