[header] How to not fall too hard for a guy [title] Control your impulses. [step] You might not really be able to control the fact that he's popping into your head a lot, but you can control your actions. Try not to constantly talk to your friends about him. 
Don't stalk him on social media. Avoiding some of these behaviors will allow your mind to be occupied by other thoughts and will help you keep a more logical mindset.