Tony -

You snuggled under a huge pile of blankets on the sofa to keep warm

Steve -

You curl up infront of the fire together

Clint -

You drink hot chocolate with marshmallows

Bruce -

You watch movies all day, both of you too lazy to move very far

Thor -

You read Asguardian books all day together curled up

Loki -

You went out in the snow and had a snow ball fight