To know whether you're the subject (I) or the object (me), first look for the verb (in she loves me, the verb is love). That's the subject. (She's doing the loving, so she's the subject). If you're the subject of the verb, you must use I. In all other cases, use me (after a preposition and for an object. The object of the sentence is the person the verb is being done to, so, in she loves me, the loving is being done to me.) Written Jul 5, 2013 • View Upvotes.