As much as it was that sort of physical want Greg had, it wasn't what he was trying to tell Theo. He couldn't help but shift slightly as Theo touched him between his legs, but he didn't openly encourage it; instead he lay there, still letting his fingers run up and down across Theo's skin, "You are like a devil, tempting me so, Theo, love," he murmured into Theo's hair, "You overpower me with you persuasive nature," he said, chuckling low even as he rolled back slightly.
His movement pulled Theo onto his chest slightly, and he gave made a slightly happy noise, unable to push Theo's affectionate gesture away from his growing groin. It felt so incredibly good, and he thought if he didn't do anything but let Theo act, maybe, just maybe it would work out.
"Sit on me, Theo," Greg said, and then added quickly, "Only if you want," he added with some hope. He had no idea what he should do about everything. Clearly, Theo had gone a bit mad and something triggered it; Greg could only guess it was something at school as that was the source as that was where Theo seemed to keep going. Greg wondered who would know and his mind went to Serverus Snape. Then it went to Draco.
Would Draco know what happened to Theo? Would Draco even be willing to give him some help? Greg pondered this as he lay there, trying to piece together what he could do. He closed his eyes, and said, "Kiss me Theo. Love me. I need you so much."