He wants to propose!!! :O

I’m going to get straight to the point my boyfriend of three years and I have recently been talking about promise rings. As I think they’re cute and wouldn’t mind being “promised”. However, I was talking about the times/situations I wouldn’t want to get “promised” in and it seems like that’s exactly when he decided he needed to PROPOSE🤦🏻‍♀️. I just felt completely blindsided. I was never a person who liked the sound of being committed to one person for forever. He wanted to propose at my graduation in which I felt was a bad time. I seemed to have hurt his feelings so I now feel terrible. It’s made me feel sick knowing I’ve upset him however I’ve always said I felt like that wasn’t a good time. I don’t know if it seems rushed or what, but I feel like it’s too soon after only three years. Maybe I’m crazy I just don’t know how I feel now. I’d really like some advice and love to know what people think on the matter. Is three years to soon? Or should I just get over myself??