Most of the time, guys just want to unwind, even if it involves doing absolutely nothing. Most guys are not big fans of chitchat, so don't feel slighted if he doesn't want to talk, whether it's after sex or just over a meal. Don't be alarmed if you can't reach him or don't get a reply back immediately when leaving him messages or texts. Give him the occasional night out with his friends, while you spend time with yours. Find activities you enjoy without him, whether it's volunteering, crafting or sports. When you do spend time together, it'll make your time richer and allow you both to have something interesting to discuss. Above all, if your clinginess stems from the worry that your relationship is shaky, then discuss your concerns with your partner. Be open to suggestions he might have for improving the situation.