well we dont know any of your circumstances so we really dont know how to comment -- he might be a monster or one you have never seen or had little contact and we dont know either ages - i would say just out of the blue - No - and this isnt a normal loving way and could be very ungrateful and very hurtful -- now do we get a little insight
Trust me your father is one if the most important people, cherish the moments you have with him. Cause you'll miss out on a lot if he's not in your life. Unless he's done something absolutely unforgivable just try and get along. Hope everything works out with you and your dad (:
Try to find it in your heart to forgive him. Take it from me when you dad and mom are gone they AREN'T coming back! Accept him for who he is, not for who you want him to be. Let go of having the perfect parent...you'll be much happier. Good luck.