Sagittarius men don't know what they want
I'm a Pisces woman "dating" a Sagittarius man for the last 9 months. We started off hot and steamy for a good 3 months. Something happened the next month, a flip of a switch, and he became Mr.. afraid of commitment. So then it was "casual" for a good 4 months. He has wanted to keep me as a friend and end the "relationship" we have because he doesn't want it to go sour and us not talk again. I have been extremely patient with him and he has become my best friend, and I am his best friend. We do everything together. Absolutely everything (yet there has not been anything physical between us for a good 2 months now) - not even kissing or holding hands, just hugs.
Sag men do not know what they want, but they don't want to let you go either. My interpretation of it, as I even called him out on, is that I was the reliable van and he's looking for a sports car. He told me I was definitely a sports car, he just doesn't know what he wants (when men say that, it means they do not want you ladies). Not to be cocky at all, but I am one to turn heads when walking in a room - so why waste my time feeling like a van when I know I am a sports car?
Don't hang on - as soon as you leave them to venture on to something "better" - they will chase you because that's what they love - they love to play the game.
If you want to keep your sag man, then learn how to play the game to keep him on his toes so he has to continually work for your affection and attention. It may be exhausting, but with an outcome that will be so great. :)