HUGE UPDATE, PLEASE READ AND HELP!!!

So I feel like I had been doing fine these last couple of weeks. My next appointment with the DB coach is Friday.

However, last night we were hanging out, it's the 1st time in a few weeks. I felt things had been better between us lately.
She had ignited a lot of text conversation and I felt I had done a better(def not perfect)job of following the 37 rules.

So we were watching a movie and she says my friend keeps asking me to take her make up that my wife had bought for her friend. She was like I don't feel like it, but ima go because she keeps saying she wants me to.

I was like fine but don't take a long time. She was like I'm also going to stop for a pumpkin pie at mcdonald's and I was like yeah get me one too.

She left like at 8:30ish and didn't get back until 11:15ish.
She smelled like weed and I called her out on it. She said she had smoked and then I asked about the pie she said she had gone to all three local mcdonalds and there wasn't one.

All night I couldn't sleep in the morning I get up for my run but I grab her keys and check her car. And yup, the make up she was going to take to her friend was in there. I felt like crap. I went on my room got back and asked her if her friend had gave her the money for the make up. She said no, because she didn't have it. I then asked her why she lied because I checked her car and the make up was in there. We didn't really have an argument, but I felt in my old ways and started to make sarcastic remarks and jokes. I then asked her if she was with her other friend who I know smokes weed, she said yeah.
When she went to bathroom I checked her phone but was kinda nervous. I realize i was the 2nd to last text and thought that was strange, since the last time we texted was 6pm the day before so my theory is she deleted some conversations.
My big effup was that I tried to set her phone to where she went it would notify me and she caught me.
I apologized for doing that and left to work.
All day sarcastically she's been sending me her location.

I don't mind hearing the hard truth and even some "I told you so" or "what comes around goes around"

What hurts the most is she left her son and myself for 3 hours while she went to go smoke weed with lord knows who.
This is not the women I want in my life.