I was my girlfriends first love and she also had her first time with me. Is she going to love me forever?

Hello Steemians!

I whant your opinions in my situation with my girlfriend ..

My girlfriend never had a boyfriend or Sex before we met.
I really love her and I've heard that females will love their first love for the rest of their lives even if the relationship ends somehow.
Ladies, is that true? Or just fairytale that I want to believe because I'm so deep in love with her?

I will thank you for your helping ;)