Ugly to my entrie generation?

I seriously feel ugly like I won't be found attractive by guys. My friends always tell me I'm pretty but guys never come up to me or anything but my friends constantly have guys asking for their numbers and talking to them. Then they complain if a guy isn't attractive or whatever. I can barely get a guy to ask me a question about homework! Like today, my crush was asking around for help and my friend told him to ask me because I'm "smart" he said hell no... What did I do to deserve any of this? I'm seriously considering on trying not to have any crush cause guys are jerks; it been a recurring thing!