Eddie was, very quickly, getting a little bit lost in Richie. He grabbed on and held wherever he could manage to get his hands, doing his best to counter-point whatever Richie did so they both got as much as they could. Though he had far less doubt than he'd ever had with anyone else as to how good this really was.
He felt Richie's hold get tight and just rut his hips harder for it before he even realized what was happening and when he caught on he could only groan into Richie's skin, dig his nails in, and keep rocking against him. It made the mess even worse but Eddie was far too absorbed at the moment to care, he was right on that edge and needed to follow Richie over. It didn't take long, less than a minute, though it felt like more, and the slow buildup crashed over him suddenly. He pressed them as close as he could and groaned loudly into Richie's neck, the last few thrusts shuddery and erratic.
He collapsed on top of Richie then, not ready to move away but not cognizant enough to hold himself up anymore. "Love you," he mumbled, soft words muffled as he kissed behind Richie's ear and under his jaw.