James: A picnic on the Quidditch pitch, set up by him with help from the rest of the Marauders. You and him eat your favourite foods while talking about the various things you are into like music and what you want to do in life.

Sirius: You start with butterbeers at the Three Broomsticks before walking around Hogsmeade, holding hands and talking about the bands you want to see in concert before you both go into Zonkos and then Honeydukes.

Remus: You and him meet at a muggle bookshop where you both pick out books for each other that you think they would like before going to small cafe that overlooks the ocean. As you eat, you discuss the books you had bought and the types that you both like.

Peter: You and him meet at a muggle cafe shop where you two drink hot chocolate and eat slices of your favourite cakes before going to the park nearby and sitting down at a bench together, talking about your interests and dreams.

Regulus: He surprises you by setting up a romantic dinner in the room of requirement with your favourite foods. You and him talk about your passions and your very different families which is a sensitive topic but he trusts you enough not to be judgemental about it.

Lily: You organise to have a picnic by the Lake with plenty of her favourite food where you will talk about what her  life was like and what she wants to do with it.

Marlene: You two walk around Hogsmeade, hand in hand, stopping at Honeydukes before going to the Shrieking Shack to look around. You then come out into the snow, beginning to throw snowballs at each other.