I keep thinking about my bfs ex?

I have no confidence in my looks but i know for a fact that we are very very compatible with him. LSS He didn't say directly but he clearly thinks that she is prettier than me. They broke up like 5 months ago but he said that she was the one that broke up with him. Now, all these things add up to that *he isn't over her and he still likes her, if she didn't break up with him they would still be together happily :c* does this mean i am or my jealousy is toxic?

For those who wanna read one more thing : they haven't seen eachother for over a year and next year we all will be in the same campus and we will see eachother for sure. What if he thinks she is much prettier than me? It's alr if he thinks other random girls are pretty sexy or whatever bc it's normal and even i say oh look at her she is so beautiful etc but i can't stop having stomachaches when i think about him finding her sexy/pretty. I know i'm not pretty but damn im sexy and smart, tho what if she is better? What do i dooo

I keep thinking about my bfs ex?
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