Just unhappy with my life....?

Im 18 year old male. Let me start, things cud be alot worse. I am a confidnt individual. I see ppl with things worse and in a way I ave nothin to be complainin about but at same tim I just am’nt hapy. I supose my main problms r self consciousnes nd paranoia. I am’nt sure if the problm is wit me expectin too much in life. This is sad, but I upload my image onto this in recent months and ppl said that I was'nt brad pitt but I wasn't ugly eithr. However, I had a perfect childhood and went in with an atitude to tenage years thinkin things wud be the same. I was wrong. I went to my first disco thinkin it would be the start of the girls, I ended up not gettin girls and had a remark made by a girl that I was ugly. This cycle continud for ages (not the coments, just not getin girls at disco's) and I felt degraded. Howevr as I said things cud have bn worse, there was stil times when I did get girls at discos. But soon I became aware that the world was'nt goin to be easy and that things woud’nt always go my way. I found this awful hard to deal with and this is when my self consiousnes startd. There was a stage when I went 2 yrs without gettin a girl. I felt so behind every1 else and degraded. I don't think I'm hideos looking. But there r times when I feel very unatractive. There was a stage in sumer where my hair was nice and blond. I was dresing well and goin thru a stage where I felt confidnt. I still didnt have too much luck with woman tho. Recently on a night out I got a girl, she was all over me, I even fingerd her (my first bit of ual activity with a girl and i'm 18). I was hapy and she gave me her numbr but she was drunk at time. She was'nt entirly drunk but she had a few drinks. I know drunknes isnt an excuse but since then she doesnt seem to want to know me :(. It seems that I only get girls when theyre drunk and theyre not atracted to me when theyre sober. I have cut my hair now, its short nd gingr again and I just feel very unatractive. with the long blond hair I cud see how girls could be atracted, but the way it is now I just dont feel a girl would be atracted to me. I know people may say ''just let your hair grow and put blond in it again'',but in fairnes, i'm still going to be in the public eye the way I am now. I just feel that unles i'm wearing the perfect cloths that suit me, have my hair the perfect way, and am keeping fit and exercisin, thers no way Im atractive. Ppl might call this lack of confidence but it is'nt realy, I call it self aceptance, which I find hard to deal with. I supose in a way I can be glad that at least I have potential. I'm still a virgin. alot of 18 year olds are virgns but all my frends ave lost it (I know that for fact). I was at house party recently, there was 40 ppl there and I honestly think I was the only virgin ther. I had a thing with a girl a few monts ago, she thougt I was the best guy ever yet she never wantd to engage in ual activity with me, while she did with other lads. I just feel that I totaly lack the sxc factor which atracts girls and that unless my hairs blond, I'm keeping fit, and wearing the right clothes,theres no way girls will be atracted to me, as I said its not a lack of confidence.I'm starting a new life in colege next week in new place, which is why I'm writing this for advice. I plan to keep fit and stuff, but this is where the self consiousnes is again. If im keepin fit, it will be in the colege gym, wher there will be loads of girls. Runnin full force on treadmil, my big tall self, I'm going to feel pure self consious and feel I will be unatractive. I want to make most of life to impress girls etc, and c this as the perfect oportunity as its new place. but there straight away, I feel that when im trying my best to keep fit in gym, with my big tall ginger head runin on a treadmil, I will instantly look unattractive. I'm not an idiot. I know that personality maters most, and I have that. I'm able to talk to girls, come acros as frendly and cool, and be funny at times. Thats nt a problem for me. Its the self consciousnes that ruins me. Basically my problems r self consiousnes and wanting to make the most out of life. I know personality matters most but I want to gain most from life I can. I wud love to be that boy who girls come upto, instead of always having to make the effort. I am very unphtogetic. the amount of photos I had to untag myself from facebk bcus I looked so bad . Im realy tall which is why I feel I stand out more than others, this links in with the gym. I don’t know if braces will improve me, my teeth are not bad but I feel they could make me more confident when smiling. But I just want to know what exactly my problems are and how to deal with them. I want to make the most of my college experience and reach my ful potentil hapines wise,so I am going to thanku for advice in advance :)