Hi Emily..I think you just need to give time for yourself a little bit. Do the things you wanna do. Learn to say "no" sometimes when you know that there's nothing much you can do to help. Help yourself first before helping your friends or other people. Don't blame yourself if you can't do much for people, it's not your fault. Relieve yourself with too much stress. Stop thinking too much,specially of negative things. Relax. You'll be fine.

Remember Emily, that we only have one trip through this world and we need to learn to take care of ourselves in healthy ways. When I was your age, I worried, worried, worried and did everything for everyone else, putting my own thoughts and feelings aside. When I was 32, I decided i needed to get some folks off of my shoulder. I had a great counselor who really helped me with this and kept reminding me that this was MY life; not my mothers, not my fathers, etc. With her help, I came up with a "go to" statement that I would use in many situations that I continue to use today and that is "I love and respect you, but I need to do what is right and best for me" so today I need to say no to some things. Take care of yourself, first and foremost. It's ok to say NO to things and always try to keep a positive attitude. Hope things turn around for you. Remember, this is YOUR life! We only get one trip through....

You need to either see a therapist,if you can afford one, and if you can't there are great books(and workbooks) out there. The reason why I say this is because a therapist or the other option can teach you how to put yourself first, guide and teach you(step by step)how to take care of yourself, and give(and teach) you the tools you need to have in order to maintain this care.
Another thing is look for a support group in your area. There might not be one but,if there is,it would be a good idea to join. If you join than you'll have double the support(physical and on line).