Could I have some advice please?

Hi everyone! I am visiting my grandma/cousins/uncle/and aunt this summer. I'm in Indiana right now, and I traveled from Germany.I am only here in Indy for the summer, but I am so homesick :( What do I do? On Wednesday I am going to King's Island with a group of teens (my grade and up) with a church group. I am excited but scared to be around people I don't know. I miss my house so much :C Any advice on being un-homesick? Btw, I am American, I go to American school in Germany.