What's wrong with me?

I have the perfect boyfriend. Been together for 5 years. We make a great couple. Same ideas, values, morals. My family LOVES him, so much so he has been given a share of their businesses and has successfully played his role in the company for over 3 years. My parents always joke that if we ever break up, they are adopting him (as they just love him so much), of course they are my family and will always support me first. The reason I'm saying all of this is because it's like on the outside it's perfect. And on paper everything is perfect.

But the truth is... I have no feelings for him. Never have. Started off as a rebound. Ever since I've been an observer of my own life from like a third person perspective. It's like I've been dreaming the past 4 or so years. It's like my life is on autopilot. I have started "waking up" about a couple or months ago. When I did in fact realized how much little I feel for this man and omg where have 3 years of my life disappeared? I have been doing so little with my own life. I don't know what to do. From what I've read so far, I have probably dealt with depression. But now I just feel guilty about my lack of emotions for this man.

We have been living together about 4 years now. I have always tried to convience myself to just give it time, but I still feel nothing. No love, no passion, no attraction, nothing. What is wrong with me?