Am I not likeable?

So I posted earlier already and again my old ex has proven he doesn't really like me, he just likes to flirt around.

I've never had a lot of guys interested in me... Infact I can count on my hand the number of guys who I know have been interested...

I know I used to give a death stare to guys cuz I didn't want to be fooled around with... I take relationships as a serious commitment.

So what's wrong with me? Why is no one interested in me?