I am a female but I have been in different scenarios with men and have encountered men from all walks of life but I find the following to be very true. A man should be courting you, he should call or text often, you should hold off on sex for about three months and when you do finally give it to him, he shouldn't change much. He should protect, respect, provide, and profess his love for you. An interesting book that binds this concept together in such a humorous manner is "Think Like a Man, Act Like a Lady" by Steve Harvey. Check it out, most of what he shares with his readers is true. Good luck to you!