For lack of a better phrase, you got played my dear. Let the lesson be that you need to see actions and words in alignment before you allow yourself to step out of your comfort zone for some guy. In other words, if a guy isn't willing to propose to you right then and there, and he hasn't shown you that he wants to be making a home and a family with you then you should not treat his willingness to lie in bed with you be proof of his desire to walk by you for the rest of your lives. Guys and girls are different, sex for men isn't a sign of commitment, particularly as someone who wants to remain friends rather than lovers.