My girlfriend is not so much as religious, as she is spiritual. She is begging me to take up a religion, if I dont have to buy her something for her birthday. so, anyways, What religion should I look into and why?

Shed religion, for a relationship with Jesus Christ.

" I Am the Way, the truth, and the Life. No one comes to the Father, but through Me." -Jesus

your girlfriend sounds like a retard.

this, religion is terrible and full of rules.

Yes, because we all know Jesus didn't suggest that people follow ANY rules whatsoever Following Jesus makes you a Christian and it means you practice a religion.

Choose Jesus.

Grab a catalogue and pick and choose, or you could take all of the popular ones.
Like a buddistic christian who believes in Muhammad.

Natural answer would be Christianity.

I don't practice a religion lol

If I was practicing religion there would be consideration that what I'm doing isn't real

Most traditional religions slap you with a bunch of rules and say "follow these rules and your considered a follower"

Jesus said "anyone who calls on the name of the Lord shall be saved"

Make your own, lots of cultures throughout history did.