I felt compelled to answer your question. If you feel him he is there and you are not crazy. Anytime our loved ones pass they stay close to us. Especially when we need them most. After my father passed I would smell a fresh lit cigarette in my house though no one smoked in my house. But my father had smoked for years. I knew he was there and to this day I will find strange coins he leaves me. How do I know they come from him... because he collected strange coins. Love keeps our loved ones spirits around. Never feel you are crazy for feeling your son around you. He wants you to know he's there. God's light and love to you.