I think my cousin is acting strange

Hello I am a 14 year old boy in 9th.grade and I am having a problem with my cousin. She is in 12 grade and goes to the same school as I do and recently she has moved with my parents and me. the first few days everything was find but the after a while she starting acting strange towards me. She would wrestle me and not stop till I was on the ground out of breath then she would sit on me and look at me with a big grin on face that made feel very uncomfortable. one time she.tried to lick me but I managed to get awayfrom her. on numerous occasions shes tried to sneak into my room, so I had run out of my room, and on one occasion she pushed me up against a wall and tried to kiss me but I managed to shove her away run upstairs and lock myself in my room. she is my cousin and her trying to do this stuff to me is making me really uncomfortable I want to tell my parents but im nervous what do I do????

What happened when you tell her to stop? Does she ignore you and continue?

Your parents need to know what's going on... asap. If you can't tell them, tell your guidance counselor and ask him/her to talk to your parents. Really, tell someone right away and avoid being around her, especially alone. There's something going on with her, but it's not your responsibility to fix it. That's what the adults are for. You just need to tell someone so you can be safe at home.

I. Warn her first.
II. Doesn't work. Tell the proper adults.

She might be doing it for a cry for attention, changes, or anything else going on with her.

You might just have to avoid her at all cost.
You can even try to talk to her and confront her.
Hopefully the right people care.