give her simple things first like Easter eggs valintines day cards unless you know what she really likes don't give her to many gifts because it might seem like your chasing her =)
I agree to your answer above. Also, I would like to add another suggestion since you want to give cool and once in a lifetime perfect gift, I would suggest you give your girlfriend a nice bonsai. It would be a cheap investment but she will definitely treasure it. It will be a symbol of your never ending love.
A car.
A child. More specifically, yours and hers.
It really depends on what your girlfriend likes. Earrings? Music?
brazier is the best gift for girlfriend because it always remain touching the heart
Get her a book in a genre that she likes books in. If she's not a big reader, maybe get her a CD or a gift certificate to download an MP3 from iTunes, etc.
Flowers would be an ideal gift for your girlfriend at the 5 month marker.
A good gift idea to for a girlfriend in her twenties is buying a cheap bracelet. Some other gift ideas for a girlfriend in her twenties are her favorite chocolate, a card, a dress and many more.
Get her a gift. (best of luck)
The best birthday gift for a girlfriend depends on her individual interests and preferences. Some thoughtful gift ideas could include personalized jewelry, a surprise weekend getaway, a spa day, or tickets to a concert or show she has been wanting to see. Ultimately, the best gift is one that shows you have put thought into what she would truly appreciate and enjoy.
Get greeting mail
?use it
A huge bouquet of her favorite flowers (and if you don't know what they are, find out).