I accelerated from a stop,the motor kinda bogged down bad,but didnt stall.i drove a quarter mile,and it stalled ! I coasted to a lot,turn the key,it started and ran 30 seconds and stalled again.hasnt started since !

Have you checked for trouble codes in the computer already? (ie, check engine light)

1st mistake is running it out of gas! if you don't want to give someone $500.00+ to replace your fuel pump,then when it gets on 1/4 tank,consider that as EMPTY,and go put gas in it! can you hear the fuel pump come on when the key is turned to ON,NOT START? Also,This may or may not be your problem>>Engine Will not Start Due to Wireless Control Module Fault on Jeep Liberty A no crank or no start condition may develop due to electronic lockup of the wireless control module (WCM), also referred to as the Sentry Key Remote Entry Module (SKREEM). When this module fails the remote keyless entry system will also not operate. The WCM is commonly replaced to correct this concern. RepairPal Verified Average mileage: 84,780 (13,000–194,000) 11 model years affected: 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 .....53 people reported this problem