As a woman, this is extremely hard to digest because I have based all the relationship uncertainties on the fact that guys give mixed signals. However that is really not true. What women think is a mixed signal, is in fact a very clear message. He may like your company, like to hang out with you, even hook up with you, just not enough to actually be dating you.
It is time to move on. In general, guys are not expressive creatures. What they really feel comes across through their actions. Keep a close look out for those. This sounds really harsh at the face of it; however, I have also been a victim to what we may perceive as mixed signals. In spite of saying this he would still talk to me, hang out with me, do things to make me feel special. I perceived this as a mixed signal thinking eventually he would come around.
Save yourself some time and face! If he lets you go without any kind of fight, you know exactly where you stand in his life. Most guys are very particular about things they consider a priority and if he lets you go that easily, you never were one of his. I always say this, we as women tend to overcomplicate and overanalyze things. Take it at face value. All he wants to do is enjoy the good side of the relationship and avoid the responsibilities.
If you want to keep his interest, be interesting yourself. It is very crucial we realize, the difference between doing things to keep him versus being the person that he truly wants to be with. Be the person he wants to share his life with, because he already has a mother and a maid. Focus on loving yourself and being confident in yourself, leave the insecurities at home. Life is too short for games and the apparent mixed signals.