Hey Tx69,
I know how you feel, I'm 19 and I feel the same a lot of time. Ever since I was 17 I have been on my own and it seems like since I have been on my own I am so lonely and depressed with no one to talk to. Lately I have tried some new things to kind of throw myself out there to find friends and people I want to be around. First, take things one at a time, it's better to start something and finish it then start a bunch of things and leave them unfinished... make a list of important things you need to get done and do them one at a time, when you finish one thing move on to the next one
Second, Find something that interest you like a hobby or something (mine is rc cars) and look online there should be other people in your area with the same interest that have a group or team that meet every month, go to the meetings you will be able to find people that hold the same interest as you which is a good start to making friends. Third, set goals for yourself, this can be a simple as to tell yourself to take a walk everyday around the block or if you like reading finishing a book, when you meet your daily goals it will motivate and uplift you. Finally exercise, Im not sure how your money is but I signed up to a gym and started working out everyday, 1 i got out of the house at least once a day and 2 I am more physically fit and better looking
this will help your confidence for meeting girls. If you don't want a gym membership then exercise outside for an hour or two.
Try some of these options for like 3 weeks to a month and I know you will feel better. I felt the same as you do and sometimes I still feel this way but I did these things and it helped me get my mind off of my problems for awhile.
I hope you feel better soon
and I hope I helped a little