Hi i just read your post, and i can can feel whatever emotions you are going through. Probably its extremely difficult for you get over her but the truth my friend is, you have to slowly starting taking small steps that will get you out of this.
Firstly i get that you have been stalking her since you are still stuck with her but if you are saying that she is using you, even if that not intentional, its bad and it will do more damage to you.
You have to understand for your own self that it is not right and may be you have to do things which you might think is against your will like blocking/ removing or if you cant muting her so that you wont keep checking her out on social media platforms very often which eventually will stop after a while. If you cant do that may be going off from social media can also help you detox.
About loving someone i know it breaks our heart if we aren't loved back the same way we do to others but trust me on this one thing, we have to move on as there is surely someone out there for us. may be its not the right time now but soon the time will come. You need to hold on a little more and have patience and trust the process for everything happens for a absolute reason.
You might not understand this now, but i hope that day comes soon when you are free from all these tangled emotion and live a happy life again.
cheers and yes, time makes everything better