Should I go out with this guy or nah?

I have a crush on this guy ( he doesn’t know) and he likes me but my best friend does not approve and she has never even talked to him but she says if I go out with him she will “dump me as a friend” is this really bitchy? Also the guy isn’t that good looking but he is so nice. I’m honestly wondering about what I value more ( also my friend has been kinda bitchy lately)

If no one understands this sorry I thought I should ask for some help