For the advanced guys: how do you manage your girls?

1: I met a girl while she was on vacation from overseas, had a whirlwind romance and now she's gone. She's really into me and I her, I straight up don't want a long distance girlfriend but I'd like to have her in my life as she is fucking ridiculous. How do you guys go about keeping things fresh and building new memories? I like to share music and stuff, write her a letter from time to time, any other ideas?

2: I have a girl i'm seeing, another couple of girls on the line in town, and another couple in my old hometown. Playing it aloof and just being a generally seductive guy every time I see them works to an extent, but there's a risk of that game getting played out. Facebook shares of music and pics are my bread and butter but are there any little things you do to keep the romance at a slow boil without it getting overcooked?

I especially don't want a girl to feel rejected just because I don't have enough time or energy to fool around at a certain point in time. I also don't want to lead them on with anything other than my sincere desire to spark something up with them given the right circumstances.

Looking forward to hearing your thoughts gentlemen.