Oh my gawd, are you stupid or demented?
Lets sumarize this...first your self-esteem is extremely low and you are acting like a cow...all my fault blah blah...in relationship there must always be 2 people...
Second 2 options:1. He just used you to fuck you,and has you like a last resort, its the cruel reality
2. He is a total pussy,cant make his own mind and if he really loved you he would never fall out of love...thats the biggest bullshit in the universe!!! He just lost the sexual tension, the feeling...I just think you guys are young so you have to find all about this yourself...but what a pussy and believe me you dont want another pussy.
Oh and last you dont love him...you just want something you dont have,that my dear is called lust and if you believe in god you should look what it is...so go on there are plenty of fish in the sea and for fucks sake dont act like an idiot...

God can't control free will. It's sheer luck if he were to ever come back to you. But since this is almost 3 years old, Im sure you moved on.