Teen Mom 2 star Jenelle Evans and ex-boyfriend Kieffer Delp are playing a complex game of love and jealousy.

Jenelle, 20, has been Tweeting photos of herself with new boyfriend Gary Head and telling everyone that this new relationship is already serious. "She wants to prove she can move on," a source tells OK!. "She is already talking about a summer wedding and Valentine's Day engagement" — despite a one-week courtship. 

OK! GALLERY: JENELLE EVANS LIGHTS UP AT THE GAS PUMP IN NORTH CAROLINA!

Her ex Kiefer, 22, remains jailed three hours away from Jenelle due to probation violations, but he refuses to give up on her. Her talk of Gary has only made him seeth with jealousy.

OK! NEWS: TEEN MOM 2 STAR JENELLE EVANS ARRESTED AGAIN!  

What do you think of this love triangle, Teen Mom fans? 

FOR MORE ON THE COVER STORY ABOUT JENELLE, KIEFFER AND GARY, PICK UP THE NEW ISSUE OF OK! OUT ON NEWSTANDS NOW! 

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