GoNeR33

I'm 18 years old and just found today out about my...situation. I don't know what to do. I'm scared and feel very alone. I'm too young to have this, I feel like I've literally screwed my life away. And I'm even more scared to talk to the person I think gave it to me because even though he and I may not be close we still hang out the same people and I dont want to say something to him about it and it turn out that it wasn't him and have him tell everyone. I'm so scared. I can't stop crying... And it doesn't help that my mom and oldest sister are looking at me like I'm a different person, like they don't know me and don't know what to say to me. But I'm just terrified I'll never be able to have a normal sex life with the man I marry. I don't wanna pass it on to anyone, ever. So I guess I just need real legit answers about how it can get passed from person to person and how I can have sex with someone I love and care about and not give it to them. So please anyone who can answer my questions please help. Like I've said...I'm scared...please help me