SUBREDDIT: r/relationships
TITLE: Me [17 M] with someone I'm interested in [17 F]. Who would she choose?
POST: Sorry for the vague title and my terrible grammar. 

I recently started liking a friend of mine (we'll call her H), and through deep talks it came to the point where I told her my feelings for her. 

Note: This was over text. (We have no time to meet up so we mostly spend our time texting)

Anyways, I told her my feelings for her and I knew there was another guy (we'll call him J) that likes her. The back story on J is that he has liked H since freshman year of high school. Apparently they dated freshman year but it never worked out. They tried again sophomore year, but around this time H had feelings for me and I didn't know at the time. One year has passed and now I have feelings for her and J has taken another try to date her. H has told me that she has mixed feelings and I hope something works out between us.

So the question I'm here to ask is: Who would she say yes to? What can I do so that she would choose me?
TL;DR: 
I like girl. Another guy likes said girl. Girl liked me last year but guy has liked girl for 3 years now. Who would she choose?