He'd crush on Lori, but she wouldn't pay him any mind.
So, he'd go out with Leni, taking advantage of her stupidity to make Lori Jelly.
Things would backfire, Lori still wouldn't care, Leni gets crushed, they breakup.
Then, Lincoln would feelbad,do something to cheer leni up, and realize in the process that he liked Leni more.
She'd forgive him, but refuse to ever date him again.
At least for awhile....