The best anyone here could come up with is something generic that would contain absolutely nothing original about you and your girlfriend. There's no possible way such a letter can be personal.

Put some effort into it or don't write it at all. Asking someone else to write it is borderline pathetic.

fixed that for you

Why you writing a letter for someone you've dated for 5 months and on top of that not even write it yourself lol

Never go full retard

Vouch

I wrote letters to my girlfriend before we even became a couple. Worked like a charm. If you put some effort into it, letters can make panties drop like leafs in autumn.

(Insert name here)

You have made me very happy the past 5 months and I'm glad I found a woman I can be completely myself around with. Here's to a lifetime of happiness and love!

my dick is hard,
your pussy is sweet,
I'll make you cum,
while you make me skeet

Happy Birthday (girlfriend's name here)!

Even the sweetest Birthday Cake could never be as sweet as you!

haha write it yourself

Roses are red voilets are blue its only been 5 months but im really into you

put on card with flowers gg iso 100fg