Welcome champion to the beyond blue team,
Some good advice from Whiteknight that can help you thru this for you.
I think your friend likes talking to you, I think she would see that you like talking to her too.
It sounds like she has a lot of friends and that great. I like the fact that she added you back on social media. If she didn’t care I think she wouldn’t worry about re adding you.
It tough when you fall heavy for someone, and they don’t get as emotionally attached as you do. But I think just hold back like Whiteknight says, she would like to see ya around again I say.
Try to look at her coming to see you when her boyfriend or person she seeing not paying attention as a good thing. You might be surprised how much she cares. You bring something to her life that she likes. Try not to look at it as a downer look at it as a positive that you got a lot to offer.
Try not to be afraid of caring for her even if it hurt, you never know things could change for you. Be yourself and enjoy the little moments with her. It get easier as for find way to better handle it.