Yeah. When they had this whole bomb crisis thing at school, Lloyd met Nina. Nina told him about the research she was doing on energy sources... and something odd happened after. I cant remember it exactly.
Later during that ep, when the action started (battle, not sex) Lloyd was worried about the wellbeing of 'his little girlfriend'.
It was during either that ep or the next when the remark about him "not being interested in interhuman relationships, even though he still does keep the basics of it, in other words, sexual impulses.
Did he fuck her?