I also feel like that at times and when I do I have to look in the mirror and tell myself over and over what I have to be so thankful for and to tell myself over and over that I'm a wonderful person.
My 3 1/2 year old son is a blessing. Every morning when I'm getting ready for work my son says "mom, you're soooooo pretty and I'm your boy...I love you!!" that just melts my heart and those are the times that I realize I have everything in this world to be thankful for. He doesn't say those things to my a he says them to me.
Listen and believe your daughter. she is telling you the truth. Those things are how she truely feels about you and how she and others see you. Write those things down in a journal and look at them everytime you start to be down on yourself. You are a wonderful person and have alot to give. You are an inspiration. Believe that, all of us here do!!!
Take care and know we are here for you always!
Galnva