<human>: My boyfriend and I have been dating for five years and honestly it's been great. We're very good to each other and things work well between us. We've even moved into a flat together some time ago. No real issues between us.  

However as we get older and our relationship goes on the topic of marriage is constantly on my mind and we've even discussed it various times in the past year. I have just now come to the realization that I don't want to marry him. I can't. He just doesn't feel like the one. We get along great, I think he's a great person, but I don't feel like he completes me the way he seems to think that I complete him.  

Am I a complete bitch for not wanting to marry him? I do care for him and love him, however I just don't see a marriage in our future and I don't know how to tell him. Telling him how I feel would obviously end our relationship -- which I don't exactly want to do -- but seemingly must be done.  I don't want to waste anymore of his time.

What do I do?

Could you distill the essence of the text into 1-3 sentences?
<bot>: Have boyfriend of 5 years. Isn't the one to marry. Don't even know how to break up cause I still love him.