Ask her what she wants to do, but do some stuff you like too.
Text her, call her, and talk to her face. Just don't do it 24/7. That's just creepy.
Find out what her interests are and then get a matching gift, but not too many. If she is anything like me, too many gifts is just too much and then I feel guilty because I don't have anything for them.
Go on adventures! Yeah, just go for like, a walk in the forest(if she likes the forest) and tell her to show you anything interesting.
Show her that you enjoy her company. Show your friends to her and hang out with all of them while keeping attention on your girl too.
Most IMPORTANT - DO NOT(doubt this will happen though, sorry for caps by the way) DO WHAT YOU WANT WITH HER AND LEAVE!
If she seems upset, comfort her. If it was something you did, ask how you can make it up.
I happen to be a girl so I really hope this works. Good luck!