2002 Jeep Liberty Wont Start

I have an '02 Jeep Liberty. It has about 85000 miles. About a week ago it started to have problems starting (slow to start when you turn the key). Usually just giving it gas when starting it helped it turn-over. Now unless it is jumped it wont start. I don't believe it is a battery problem because all the electronics work fine when the key is turned. Also if I allow the car to idle under 1 RPM it will stall. I have been driving it with two feet for a while then it goes back to working fine.

Any help, is it a sensor? Is it the alternator? Any other suggestions?

Thanks