100nl pair+flush draw, im lost...

Pokerroom 100nl full ring

Relevant stacks
hero 105
MP 91
LP 96

preflop
MP calls, LP calls, Hero is dealt 10 [img]/images/graemlins/diamond.gif[/img]8 [img]/images/graemlins/diamond.gif[/img] in SB and completes, BB checks.

flop
10 [img]/images/graemlins/spade.gif[/img]K [img]/images/graemlins/diamond.gif[/img]7 [img]/images/graemlins/diamond.gif[/img]
pot 4

Hero checks???, BB checks, MP bets 1.50, LP raises to 5

Being OOP here sucks. Couldn't think of a good line to take with this hand. Should I have lead pot sized on the flop?