[header] How to tell if your best friend loves you [title] Compare how they treat you. [step] When you two are spending time with your mutual friends, see if they treat you differently than how they treat other people they are friends with. They may be more affectionate with you, try to talk more to you, or make comments about your relationship. 
[substeps] When your best friend treats you the same as any of their other friends, it's unlikely that they're interested in you romantically. A friend that treats you like they treated their exes may be interested.