What can I do to show him I love him?

My boyfriend of 10 months broke up with me this morning. I take full responsibility for the break up. He has taken very good care of me and of my kids. I never gave anything back. I have severe problems with depression and it's been a very rough year for various reasons. I adore his family and my family is crazy about him. He just got tired of giving and giving to someone who didn't give back. This is SO out of character for me. I've always been a loving, generous person. I don't know if it's because I was alone for so long before we went out and I forgot how to show love to a man or if it is because in my previous relationships I was the one who always gave and never got anything back. Maybe self-consciously I was thinking it was MY turn to take??? I'm so ashamed and I truly love this man. I think I have made a life altering mistake and I wish I knew how to correct it. I just don't know how to show him because telling him is not going to work.