Should I tell her how I feel? Or should I just give up?

i've like this girl since (let's call her tiff) my sophomore of high school. I always used to hug tiff (long hugs). I used to bring snacks to class, and one day tiff asked me where is her snack? So every since then I brought an extra snack or juice to school. My junior year of high school, tiff best friend was talking in class and I over heard her say that tiff liked her. Even though I had information that she might be bi, I never told her how I felt( I was afraid she would laugh at me and tell everyone). Now (3 years after high school) tiffs in the navy and is stationed in Japan. Now I'm finally feeling brave enough to tell her how I feel, however I think tiff is dating some guy she's stationed with. And to be honest feel like that should be me with her. However I feel like I should give up because she's probably not leaving that guy and I missed my chance with her. What should I do? I don't want to regret this. Please any tips or ideas are welcomed. Thanks

Why now? Is it because you found out she has a boyfriend? What were her feelings towards you? Did you guys ever date? Have you been in touch since high school? How did you find out where and that she is dating a guy she's stationed with?

I don't really keep in touch with her, pretty much we follow each other on Instagram. But when we were in high school I would say we were acquaintances. I always liked her, I was just to afraid to be rejected and the laughing stock at school. It's actually wrose since she got a boyfriend because now I'm thinking "why didn't I tell her?" "Did I really think she'd be single forever?""Omg, I missed my chance."

Better be sure than sorry! If you want to be with her DO SOMETHING, you should not let the grass grow under feet.

we never hung out together outside of school. the closes thing I could describe our relationship as cordial. like my sophomore year of high school, we had a class together and we would talk and sit by each other in class. after my sophomore year we didn't have classes together until my senior year( she by me, help me cheat, talk etc,). it's the same thing if I would run into her at the mall. I was thinking about logging on to one of my friends snapchat or asking one of my friends to go on snapchat to ask her what she always thought about me. hopefully she has few good words about me.