I'm not attracted to my boyfriend
What do you no longer find attractive about your boyfriend?
I think his face is too short.
It is completely normal for the feelings for your partner to take on a form different than unhinged sensuality. Talk to him and find out what good traits he has, to see if the relationship is worth keeping alive.
No, I'm not interested in dating someone else. It took me long to find the right one and now I'm good.
I'm glad to hear that. If there are some fixable issues that have come up that have affected the physical aspect of your relationship, it would help to discuss them, maybe with a couples counselor it that would feel safer.