I Miss My Boyfriend

I Guess It's My Fault... I feel stupid he doesn't even answer my text even if he's online
He keeps telling me that he's busy n i keep telling myself that someday he'll reply
Everyday my heart says keep trying but my brain says just leave, but i really dont want to break my promise n i love him too much to leave
It really feels like single already so, idk i dont want to wait anymore but making that much effort is exhausting
I dont have feelings for human anymore and if i leave him i'll be single forever
I dont want to think about it anymore, should i just forget him or what?