Girls, are nerdy guys serious turn off?

I am a grad student (physics) whose hobbies are nerdy. I like pottery and arts, writing, am very good at cooking, and volunteer at animal shelters. So far never had a single girlfriend. Girls only show interest when they want some help with fixing their computers, or help with their studies. But they get disgusted seeing me or even being friends, relationships are far from being imagined.

Most around my age want cool guys, with cars, and bikes who love partying. I spend a lot of my free money/time on helping those animals. I tend to bond with them more as I didn't have that many friends growing up and mostly played with pets.

Girls, are nerdy guys serious turn off?
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