Y'know... I was in your exact same position all the way until age 26. Then I became fit, dressed very sharp, clean cut and pimpin' drove an exotic car, was considered by women to be extremely attractive (especially in the face), was social like no other, made friends everywhere, etc. Then I became heart-broken several times, got screwed over by fake friends, dated shallow skanks and players, got caught up in the shallow / troubled lifestyle, and became severely depressed for a few years - to the point of moving away from it all, getting my life in order, feeling content with myself, having standards with people, re-evaluating everything in my life; what I've been through, mistakes made, opportunities lost, changes required, etc.
My self esteem was so low that, even after all those initial changes, I still viewed myself as (and acted of) the same fat / geeky / weak / friendless kid with no female interest. I was still bullied, used, played, humiliated, and walked over as a result - even AFTER becoming social, attractive, out-going, etc. Changing how I looked and presented myself didn't change who I was, how I felt, or viewed myself as. And people treated me accordingly: like an approval-seeking, co-dependant, insecure loser with no self-esteem.
The point is:
1. Stop whining and do something about it.
2. Change your mindset and attitude; not just personality and appearance. Be strong; not a low self-esteem whiner looking for pity (you'll only get bullied and looked down upon more)
3. Having a social life, dating hot women, and being Mr. Popular and Sexy isn't all it's cracked up to be - there's a LOT of fake, selfish, two-faced, egotistical, backstabbing, shallow people out there... especially if you make a lot of noise, and get tangled up in these scenes.
4. But, in order to realize #4, you must do #1
You're not learning, realizing, or experiencing anything, or adapting to situations, and all these things - because all you do is complain about being lonely. Do something about it. Or stay stuck in your misery forever. Those are your only 2 options.
Get out there and live. All the trials, mistakes, failures, rejections, and heart-breaks are waiting for you. As are the successes that come after. They say life is a lesson, so learn.