Me and my girlfriend have been together 18 months. We started wonderful, tending to each other needs emotionally. Sex was 4 -5 times each week, about 4 months ago we started arguing in regards to her lies, she responded " I don't have to tell you what I do leave me alone. Now our sexual relationship is maybe 3 times a month. She picks fights with me and points out all my flaws. She tells me she loves me but my question is how can she love me when she treat me that way, she never tries. Don't want to take more that I have been.

Its not love, its lust. How old are you both?

Of course, I'm not you and I've become a little bitter and such but if it was me, I'd tell he I don't need to tell her what I do either... and add the "leave me alone" part also. Then that would be the last she saw of me. Like I said, that's me now. ;)

What was she lying about? You need to get to the bottom of why she felt the need to lie to you in the first place. It needs to be nipped in the bud now or it will only get worse as you will constantly be wondering if she has lied to you or not. You need answers before you can decide if you can trust her. If you can't trust her then there may be no way that the relationship can move forward from this.

Don't accuse her when you ask her. It won't be helpful. Instead approach it as you wanting to understand why she felt it was better to lie to you. What was she afraid of?. your reaction? What you would think of her? If you would take it the wrong way?

Get to the root of why the lying started so that you can try to move on from it.

Good luck