You need practice

Get real. You aren't going to all of a sudden start walking up to supermodels and getting them to suck your dick. You've got to start small, work up to bigger things. Yes this girl is young and a bit overweight but she's kind of cute and, realistically, you aren't looking for Ms. Right, you're looking to improve your life. Talking with a cute girl sounds like a step up from where you have been.

"Hi. I'm Mike."

She looks at you and, for a moment, you think she's going to ignore you completely. Maybe walking up to strange girls who are stuck working and have to interact with people is creepy.

"Uh, hi. I'm Lupe. Can I help you, sir?"

"I just read an article on Enochian, the supposed language of the Angels and wondered if the library has anything on that."

Okay, that was a little lame but it was better than nothing. Maybe you should have said something about how you were pretty sure she could help you because she looks like an angel to you. Or maybe that would be even lamer.

"You'll have to talk to one of the librarians."

"Oh. I thought you were--"

"I'm just a library clerk."

"You look so professional, I just assumed you were in charge here."

"Hardly."

Crap. What to say next? The silence is mounting up.

"Uh, I just put in an application to work for the library system. Is it a good environment. Are the people nice?"

"Oh, yeah. Sometimes the patrons get impatient, and nobody likes it when I have to tell them that they've got fines outstanding and so they can't check any books out but all the librarians are nice and they help me with my homework."

"Are you in college?"

"High School."

Uh, okay. That is a little younger than you'd thought.

"But I'm eighteen."

That was a weird thing to volunteer... unless... wow, maybe your attempts at charm were actually working.

"It was nice to meet you..." crap, what was her name. Oh, yeah, "... Lupe. If I get the job, I guess I'll be seeing a lot of you. Maybe you can show me where there are places to eat around here."

"Okay. Bye Mike."

Awesome. You talked to a girl without getting shot down and without making a complete idiot of yourself. And, fat or not, young or not, you wouldn't turn down a blowjob from that cutie.