Different girl

I've been arguing with my mom for 4 straight months, we don't get along, and because of that I have been stressed out really badly! My parents live in different states. I'm with my dad now, because its summer , but when I was there all I did was cry, and argue, and ever since then I have had trouble sleeping. My father doesn't care about me, he suggested i go to foster care, he was never in my life , and I have got used to it, but when he told me I should go to foster care i cried for a few hours.

When I go to my dad's, I don't see him, I stay with my cousins! I haven’t been happy for 4 months, and now that I’m with my dad, when I hang out with my family and friends, I’m not happy at all, I just want to sleep, I don’t have fun, I feel out of place. My friends planned a beach trip in two weeks; I just don’t want to go. I want to go back home! Before all those arguments, etc. I was an energetic girl, who loved to be with friends, I had a bubbly personality, now I’m just down, and want to left alone. I want to go back to the old me, can someone please help :’( I don’t want to be like this anymore! It not only hurts me, but my friends have noticed I’m not the same! I feel out of place around them now, because they are all laughing and enjoying their time, while I’m down, and in a bad mood. PLEASE HELP ME :/