What are some nice gifts for a 3 month anniversary?

definition of anniversary

noun, plural anniversaries.                   

                                           

    1. The yearly recurrence of the date of a past event:

                                           

adjective                   

                                           

    4. Returning or recurring each year; annual.

Nothing in there about 3 months. Frankly I believe that makes you look a bit needy.

There's no monthly equivalent for the word “anniversary,”

There is no such thing as that.

You sound like Corporate honchos assessing quarterly results. If the relationship based mutual trust and love? One doesn't need evaluate ever. If it is passing infatuation needs rejuvenate every quarter then you need help.