Hey I'm a sophomore and there's this senior who I like but she's of course leaving at the end of the year. She likes me but I am not sure if she likes me for a relationship. Is it worth pursuing a relationship for the next 2 and a half months? Or just staying friends?:confused:

Why wouldn't you be able to maintain a relationship after school? Is she leaving town/state for college? It's at least worth starting a friendship..

You really don't know if she is interested or not, so until you know that, then the rest is speculation. Talk to her.

You can talk to her and find out what she is feeling.
I would magine that once she starts college and meets guys her own age, it will be difficult for you. But first you need to find out of she even wants a relationship with you.
Don't ask for drama. Re read your question.