I'll try to keep this short:

I've been dating a Sag for four months and feel like I am falling in love.

I know he really, really likes me too -- maybe loves me.

All I want to do is tell him. Gush to him. Tell him how passionate I am about him. But I sense he would be uncomfortable with it?

Am I projecting, possibly?

What I do manage to communicate to him are the things about him that bother me. He acts very brash sometimes. He does not say please and thank you, as often as I would like to hear it. He does not hold doors, usually. He has made crude jokes involving me in front of a friend.

I know he means no real harm. He is a good person, a nice person. I don't know what it is about him. But, I am very sensitive. I place a high value on the little niceties in life. And I am sorry, I want to be treated like a princess! The point being, if you treat me like a princess/queen, I will treat you like a king.

Can Sag just not get along with this approach to love and romance and relationships? Is he just too much into "let's play, let's be friends, why all serious?"

I do very much want to tell him about my positive feelings for him, not just the negative (we tend to talk about those things in a lighthearted way and the conversations are generally amiable and productive, SO FAR). But how do I? I'm nervous, I guess.

I'm a very emotional person (Sun in Pisces, Cancer Rising, Mars in Cancer, Venus in Pisces -- Moon in Aquarius) and I need to express! But I don't want to drive him away.

Any pointers, Sagittarians, on how you like to fall in love, and how you like to have that love expressed to you -- what are you comfortable with?

He's a Venus in Scorpio, Moon in Taurus, Mars in Sag, Gemini Rising.
Not short. But thanks.