The usual grace window for the honey moon phase which is where people will put up fronts is like 90 days or something. For me, it's always seemed shorter. Whenever I've been seeing soemone regularly, I think their true colors came out quickly. Think about how hard it is to do something you truly don't believe in. Are you able to just change at a whim?

Considering you've been together for so long, I think it would be outright obvious if there was an issue. I get being suspicious but is there something else making you feel that way? It is unusual to have something like that but not impossible.

For the record, I'm giving it another year (at least) before I move onto something permanent with her.

I made this account a long time ago, and I seldom have to ask for advice. I generally don't have to, because things have been going great for me, and I don't feel I've been seasoned enough in the field to give good advice.

I've always been a guy who valued long term relationships, and after going over a few relationships that didn't quite work in the past, I've met someone who meets my standards. My problem is, I think they might meet it too well.

For example, when my girlfriend and I met, I had been practicing veganism (for health reasons), and after talking to her a little bit, she joined me, talking about how she'd been looking for a good ways to improve her health. On that front, she's in better shape and has got a pretty great body now.

I talk about some things I like, and she picks up on them, almost immediately. I tell her I want to buy a house out in a scenic rural area? She agrees. I tell her I like having my knob polished now and then? No contest. I tell her I want to experiment with some things in the bedroom, like light BDSM? Nervous, but willing to give it a shot. There are very few things she's ever said "no" on.

She turned thirty not long ago, and I'm somewhat familiar with the curvature in behavior that single women take at that age. They know they're not "pretty princesses" anymore, and at that point, it's a game changer from being a woman's market to a man's market.

We've been seeing each other for about half a year now. Things are going great, but I get the feeling, on some level, I'm being lied to. Is she being accommodating for it's own sake? Is she simply lying her way into some manner of long term committment? We've had no problems before, and frankly, the silence is deafening. They say that if you stick around long enough, a person putting up a false front will let their true nature slip out intentionally, but so far, I'm not seeing anything.

How should I approach this?

Is she putting any pressure on you to actually get married...? If there is no pressure I wouldn't sweat it, and give it more time. The longer you see them the more likely you will see the truth. Also no harm in being honest if she brings it up. You should just sit tight though... marriage is pretty much just a piece of paper.

There was a thread here about marriage and I think there are misconceptions about divorce. A lot influences the outcome, especially state regulations. In Texas, the laws seems to be pretty slanted towards males or at least even. I have come across a lot of women who don't come out of the divorce with much of anything. Also, if there is not much for her to take then she can't take much. Not that that is what you should think going into marriage in the first place.

@Eddie Fews
I'm not particularly well-off, no. What I would hate, however, is to find myself entangled in some custody battle years down the road.

@Arch Stanton

Because:

1) she may be secretly putting up a front in order to secure some kind of committment.

2) I'd like to know how actually compatible we are as individuals, rather than the compatibility being between myself and the false front she's decided to put up

3) if I DO tie the knot, I don't want to hit any snags on the personality front

4) after seeing how bad they can get, I thoroughly despise the idea of getting a divorce.

To whom (and if) you marry is arguably the most important decision you're going to make.

I'm merely treading cautiously.
Everything about it is great, so far.

Maybe she's submissive type and likes to follow
Maybe she's just an open minded chick who is willing to try new things
Maybe she's agreeing with you to trap you

Dunno. But what's silly imo, is you're in a relationship where you dont know the person you're with. If you're with someone and call someone your gf, at least know her personality and whether she is a genuine person. Sounds like you made a chick your gf you do not know and I have no idea why you're even thinkn abt marriage when you are wondering if she lies to you.