The trick on removing an oil filter is to not put it on too tight.
It is recommended that when a filter is installed, coat the seal with a little clean oil and put on hand tight.
When you need to get it off, it will be easier.
When you have a very tight one - find a strong man (or me, if I am around) and have him take it off.
If you have to do it yourself - get a pair of good gloves and muscle it off.
If it still does not come off - try an oil filter wrench - many types are available.
If all else fails, push a long screwdriver thru the center of it and rotate it with some leverage.
I have torn apart stubborn filters, but eventually you get it off.
Good luck!