I have a important question my dad left me and how do i know of he still alive or where he lives
i hope this question isn't weird
It is so sad that your dad left you. If you have some details about him, you can try looking for him at various places. I recommend you go to the police or the department of missing persons to see if you will get some help. Good Luck.
There are many services on the internet that offer to find people for free. Look under Find People on Google for a start.