xherbivorex – first step is to like yourself. Spend time alone really really thinking about your life, what you want from it, your good points, your bad points. You either accept how you are or you refuse to be a victim and move forward. Take control of your situation.
Surround yourself with positive upbeat people and here is as good a place as any. Don't know if you've done any group rides but if you haven't, give them a go and enjoy the buzz and camaraderie.
Believe me, you can be married and still be lonely. Been there, done that, divorce papers coming through this month after two years separation.
The above is what I have been applying to my new life. Yes, it's bloomin' tough sometimes but you have to hang in there.