In the shit again!

I dont feel important anymore, im just a big pain in your life i feel kinda like a dog you dont want me here until you need something i dont think you love me anymore you say you do but the look in your eyes when you say it has changed you dont mean it anymore and i dont know why i sit and take it weve been through so much shit and yet i still dont feel like one of the family. Im pretty much left out of everything , and at the end of each day ive probably cried at least once coz of something youve said or done. I feel weak and worthless but yet i still love you wiv all my heart and i still take all ur shit, why am i doing this to myself?