I'm certainly not an expert on this, but I'd reckon that wanting a relationship for the sake of having a relationship isnt a healthy or "fair" basis for anyone - you should want to be in a relationship with a certain someone, not find "anyone" to be in a relationship with! I dont think anyone has any real advice on how to find that certain someone, everyone might have their own story there (or not... depending on their situation after all), but relaxing about the whole thing might be a good first step - even if its not an easy one.

While you'll get nowhere without being a bit proactive (Ask that girl out if you really like her and care about her!), you need to find a healthy balance here and should certainly ask yourself if you want to date someone because you want to date them - or if you only want to date anyone. As long as its the later: Dont, thats not gonna make you happy in the end.
Try to forget about it for a while. Learn to love yourself - and be yourself, you'll eventually find people that are going to like that/you! (If you havent already) And maybe they're girls amongst them and maybe one of them actually things "Hey... that guy is actually pretty cute and sweet...!"

Two advices that are a bit more practical:
You can bypass the 1.000 character-limit by editing your first post - type everything, copy, post part of it, edit the rest in.
We're also having this Hook-up-eternal-bonding-thread in the forum - you can always try posting there and see if someone takes an intrest. Some people are just looking for an ingame thing, some are open to extend it to a more real life version - good luck either way!