Here is the short story version of my problem.
Met Chelsea back in freshman year of high school.
Thought she had a thing for me.
Transferred to another high school and only talked to her once in a blue moon.
College came around, started talking more to her online.
She has a on and off BF.
I hang out with her every time I'm back in town.
She gives me a lot of IOIs.
She also does a lot of things like seeming to be interested in other guys. ie An attention whore
I'm sort of interested if there is a line for IOIs between being friends and being interested in being more than friends. Because, in the past she would hug me, write <333, call me using words of endearment. But I can't tell whether that's just her being a close friend or an actual ioi.