Do you think be able to find a new boyfriend, since I've never felt physically attracted to anyone but my ex boyfriend
I'm sure you will. What about your relationship made you guys so attracted to one another?
I listened to his problems and supported him when he needed me
You want to try your best to move on from past relationships so you dont miss out on large chunks of your life. Its natural to have these types of feelings, however you need to be able to not ruminate on feelings that are detrimental to your livelihood.
What if I have no interest in love anymore?
You don't have to jump right into a new relationship. It's fine to take some time to experience the single life and have fun. When you're ready to find someone, I'm sure you won't have any trouble.