I have read the entire first thread and this one and wow my head is spinning. I understand that you guys are starting to discuss the current status of the case, and I'm bringing up older evidence, but hopefully that's ok. I'm only a few years older than HE, and I went through something extremely similar when I was 20. My own experiences and proximity in age to her gave me kind of a unique outlook on all of this. There's way too much info floating around in my head, so for right now, I am only going to comment on the original timeline from HE's point of view.
Date with SS - I hope using information gathered from her Twitter account is okay. Going through it, she does not hide her love for marijuana use at all. I hate to speculate on a topic so touchy, but I would guess that they 'indulged' on their date and/or after. 5 1/2 hours is pretty long for a date. It's completely normal for people my age to include that as part of a 'date', so it wouldn't surprise me. I don't think any sort of usage such as that would be disclosed to the public, though. The only reason it might matter because it could potentially shed some light on her mind sight that early morning. Being impaired in that way may have made her more vulnerable to his advances. You do feel more love-y towards people/the world in that sort of state.
HE received the call from SM at aprox 1:35 AM. He told HE he was leaving TM for her. I’m not going to speculate if this was the truth or part of the trap, but this is known for sure to be said by SM. HE was understandably upset and called BW. BW later said she told HE to "not do it". That's kind of vague. Not do what? Meet up with him? "Be with" him? Call him back? Maybe I'm reading too much into that vagueness but it seems like it's worth clarifying.
Social Media - After the phone call with BW, HE posted to Tumblr 10 times. Rapid posting like that is to be done as a distraction, or while waiting for something. Particularly when it is all about one topic, such as HE's flurry of posts. SM got her thinking, she put up quotes and poems about wanting to be loved and whatnot. She was free spirited but weighed down by insecurities. She was hungry for love, but her own self doubt failed to keep her inside appropriate boundaries. This is all read between the lines of her tumblr. Most of what was put up that night has a slight note of hopefulness. It seems to me that she was at least entertaining the idea of being with him.
The twenty minutes before calling SM but after the last post to Tumblr are seemingly “unaccounted” for. IMO, she was Facebook-ing. Most likely talking to at least one person on the Facebook chat. If she mentioned about meeting up with SM or going to PTL in a private conversation on social media, I don’t think LE would release it.
I’m not going to speculate (on this post) about the next succession of calls or the contents of the last 5 minute call. I'm just going along with the original timeline, which has her leaving her apartment to head to PTL.
PTL - PTL was most likely a typical meet up spot for them. In my own experience, there is a seemingly neutral spot to meet up where we can feel safely out of sight of a snooping spouse. I wouldn't be surprised if this were the case for HE and SM. She was totally hung up on this guy, and even if she wanted to move on, it's hard for a 20 year old to do so in such a short amount of time. She cared for SM, she trusted him to protect her, which is the saddest part of it all. HE was free spirited and bold (she pursued a married man!), it’s not hard to believe that she would go, and that the last four calls were her being freaked out being there so late and wanting to know if he was close.
Okay I know thats a LOT and probably off topic at this point, but I just had to throw my two cents in!