I'm 20 years younger, but in a somewhat similar state-of-mind. I feel as though I've spent the last 7 years or so meeting a lot of people at different venues (hobby clubs, classes, work, festivals) who are very nice, but who are not interested in pursuing closer relations with me, either platonic or romantic. I was talking with my mother on the phone earlier today about this very thing.
I think Raleigh is right when he says that you are (and I am as well) catastrophising your view on this situation. There is nothing wrong with wanting friendships and romance; it's a very normal human need. But it would make us very unhappy if we bite ourselves into that desire for closer contact with our fellow human beings, and stare ourselves blind on what we are doing wrong in trying to establish that contact. It then becomes easy to jump to a conclusion such as: "I am probably utterly repellant to most people; they all head for the hills when they see me". I've thought the same thing, this very week, when I was caught in an episode of mild depression.
But it's not true.
There are folks I can talk to just fine, at my stage acting class, at my First Aid training, at work, etc. etc. Maybe I haven't yet met another person who is specifically looking for friendship (or even romance[!]) themselves, maybe when I do, I should pick up on the signal, and I could try my hand at building my part of the bridge between me and them; because establishing these relationships and making them grow is something that comes from both ways.
Also, when these kinds of things are starting to break me up, I always try to take a step back from it and not think about it too much (seeking out friendships and/or romance, I mean), because if I let it take over my mind, it just gives me stress and anxiety, and I'm a lot less pleasant to be around. That's why it's also good to put the need for closer socialisation on the backburner. Maybe for a couple of months. Maybe for a year, however long it takes. Just so you can reduce your social interactions to a pleasant, but distant, activity. Maybe the people you deal with on a daily basis think of you as something of an oddball. It doesn't matter; that's what they think of me, and I can't change that about me without feeling unhappy. But some folks who see me as an oddball like me for it. And those are the ones I focus on, instead of the ones who shun me or mock me.
Then, once you've gotten more comfortable in your own skin, and feel good about yourself, that's when you can focus better on approaching others for friendship or a romantic relationship. You'll find that it goes a lot easier when you're in that mindset.
_________________
clarity of thought before rashness of action