evertking, remember to take care of yourself when in a LTR or marriage. Many guys get swept up in the romance/sex that they forget about their passions, dreams, bros, and hobbies because of chasing tail.
The things that first attracted her to you could be things that keep her attracted to you.
If you given 100% of your time to her... you may lose your self-identity in the process.
Keep your job/career flowing and do something spontaneous every now and then to keep the mystery alive.
Take a roadtrip somewhere, do something novel that you always want to do someday but never got around to and let her tag along.