Hi: Don't feel alone , A lot of us have sad feelings and less than perfect pasts.

you can only do what you can do. Make the best of your situation and let hurts and fears and the past bad experiences go Try to make something positive and good for yourself ... It is okay to say I love you. God loves you. A lot of people care.
Try to make yourself happy with the present do fun things, Maybe try to make a friend. Go to a funny movie. Enjoy life. Life is short and the world can be a beautiful place. Best of luck to you and I will pray for you.