Should I be worried about my weight?

I just check my weight every day...I used to be anorexic when I was about 15; I won't lie. I am 4'11 and have been for years now and I am also nearly 17 now. When I was anorexic I was about 79 pounds or so. Before my new boyfriend I weighed about 92...which I felt was good for me..I wanted more of an 86, but 92 was okay. Well my boyfriend kept telling me to eat because he seemed to think I was eating when I was hungry and now magically I weigh 100.2 pounds. I'm so irritated...I feel like a cow and whenever I look in the mirror that's what I see. My family seems to think it's funny to make fat jokes about me and it makes me want to lose weight but I've been awfully hungry lately. I've been trying to eat less and I weigh myself everyday and take my dogs on walks but I have not lost any weight...I am really freaking out about this. I have never weighed 100 in my life. Should I be concerned?