Like what in life that's worth a shit don't take some effort?
Being lonely sucks yeah...but take at least a bit of responsibility for it and realize that people make major changes in their lives every-damn-day.
Heroin addicts get clean EVERYDAY...you think being lonely is worse than kicking that shit? Guess what...you're wrong if you do.
Take small steps. Smile more. Be interested in others. You can do it for sure.