JT-
This is pretty normal with long-distance relationships - they're difficult to maintain as time goes on. There usually needs to be some hope or prospect of closing the distance sometime soon.
You're doing it the right way for stretching out attraction/engagement in the relationship while you're long-distance - seeing each other every 2 to 3 weeks. It's
really important you provide a great experience for her every time she sees you though, as much as possible - incredible sex, lots of orgasms for her, and lots of high quality connection and bonding time with just the two of you getting a lot of eye and body contact.
Long-distance relationships tend to follow a couple different patterns:
- 1. One of the partners decides that what he/she is getting isn't worth the time he/she is putting in to get it, and begins withdrawing investment.
2. One of the partners meets someone else much closer by who's exciting and intriguing, and this person supplants the distant partner's role.
3. One of the partners decides that he/she simply cannot stand being apart from the other any longer, and moves to where the other partner is.
You usually need #3 to happen for things to work out long-term, and you need it to be her coming to you (if you go to her, the balance of power tips strongly in your favor, and you've lost whatever challenge / intrigue you had). If she isn't crazy about finding a way to come be near you permanently, it really just ends up being a game of "how long can you hold onto her."
The one exception: when both partners are living in areas where the dating pool is small / the choice of replacement options is slim. Simple supply and demand... if she's in a small town where no other guy's going to come along and scoop her away (or tempt her to let herself be scooped away), and you're working on an oil rig where it's just you and 20 other men, both of you will usually be fine exchanging the odd phone call or love letter until you can be back together again. But, when there's a lot of competition for her or you, and the other partner isn't there to act as an outlet for whatever energies get stirred up, it's substantially harder. You're working against time.
How much longer do the two of you need to be apart (i.e., not living within close proximity of each other)? And, if it wasn't working, would you be more likely to just leave where you are and go where she is, or to tell her why don't we take some time to date other people now, and if we want to pick this up again later when we can really be together, let's do it?
Chase