well, i could give you a way out there explanation for it if you believe in energy and how it works, like people having auras and stuff. our bodies run on energy and that is what creates our aura. i was very much into this stuff in the past but not anymore. but it would explain why you feel him. it is like when you know the phone is going to ring, you are feeling the energy of the person calling. so it is simply that you are acutely attuned to his energy so when it comes close to your energy field, you feel it and know he is near. so you can take this or leave it, but that is how i would explain it.