I think the guy I am dating pretends to be someone he is not ?

I am dating this nice guy, he showers me with gifts, and is very loyal to me. But there are some things I dont find him quite manly. In some situations, when I needed to confront a taxi driver, or when policeman said we cant lay in the park, eventhough we werent doing anything weird"#! The nice guy just didnt have the manhood to stand up for us! which I find most unattractive. Instead I was the one ready to wear the pants. The nice guys keeps on been nice, but I dont think I want to be with someone who is not manly, where I can feel protective, and secure. I think this whole time he has been pretending he is in to martial arts and he is a big tough guy. But I think he was just showing off?