How can I become friends with a guy, and talk to them?

ok. well lately ive been feeling really insecure because all the guys in the class ignore me. Im pretty sure it has to do with looks and personality. Im soo CONFUSED! In our class all the guys talk to the loud, girls that seem so sure of themselves and fun. eevn the ugly ones they seem to like as freinds. and im going crazy because i remember i sued to be friends with all these guys and now they just dony talk to me anymore! I'm a 13 yr, old girl in grade 8, and im really confused about how to act around guys. They seem to expect soo much. I mean looks, personality, perfect grades its too much to handle! I dont even know who i am...? how am i supposed to act mmyself around others? I feel so akward self consciouse, and UGLY. I mean i have tonnes of girl friends, but the only way i can actully get out a few sentences with a guy is if one of my girl friends is there and they start the convo. Also, all of the grownups , some complete strangers compliment me on my hair, or how pretty i look. But i really dont believe any of these comments because all the guys seem to think im disgusting. Like today, im like hiii to one of the guys and then there likee ewwww and they ran away. and then all of these girls in grade seven always compliment me there like ur soo pretty.I feel like im a hideous freak now becuuz of all the guys in our class. And this past year or so ive become really quite, i used to be louder, not so self consciouse, and not afraid to speak my mind. Now, im afraid when i walk into the classroom, ppl are already judging me on everything, my hair the way i talk %26amp;%26amp; walk. I think this is partly becuuz my x-friends always judged me and made fun of me calling me stupid and stuff, but i really wish i could just let loose, and be friends with a guy again! I mean is this normal? not being able to talk to guys, but b4 all the guys were like mii friends? HELPP!!!!!!How can I become friends with a guy, and talk to them?
your in 8th grade, the worst grade for guys because that is when they go through puberty. it sucks, but guys are real jerks than, and you just need to keep your head up high, join club, after school activities so you can meet new people. AND most importantly don't give a damn about what other people think of you,because it'll get u nowhere in life. GOOD LUCK!! =)