Getting impatient...

I've been dating a guy for about 3 months now and I'm ready to become exclusive but he says he still had to make sure. I've been completely open and honest as guilt the fact that I want a relationship and I'm at a point in life where I want to find a husband. He's had told me he understands and that's what he is looking for too. I even tried to leave him alone because I didn't feel like he was on the same page so before we got too deep, I wanted to end it and spare or feelings later. But, he assured me that he is very interested in me and happy with what we have and wants to see it grow...it's been 3 months and we're still not exclusive and I don't know if I'm just being impatient, but shouldn't he know by now whether or not he wants a relationship with me? I don't want to seem pushy but I don't want to waist my time either. I don't know what to do.