I think that Ezra was boardshorts/ the beach hottie and that Alison and Ezra had some sort of relationship. I do think that Ali lied about her age to him. From the photo’s in the Ravenswood lair it looks as if they were in cape may. This is where I think something went wrong-Ali did something Ezra didn’t like or vice versa, causing him to get really angry towards her which is why she became afraid of him. Perhaps he found out she lied about her age or when she had her pregnancy scare? (if he had already gotten Maggie pregnant in high school imagine what Mrs. Fitzgerald would say if he got a 15 year old girl pregnant) so I could see why he might go nuts.
Everyones wondering whose body was found if it wasn’t Alison, remember Jason’s flashback from that night when he had mistaken CeCe for Ali? I think that CeCe had a twin, and that night whoever was wearing the yellow top (say it was cece) got killed by either Alison/NAT/whoever which allowed them to use her body in place of Alison’s, hence why mrs Dilaurentis said she only had to see the yellow blouse to know it was Alison(both girls were wearing yellow blouses that night so it could have easily been cece instead)
that’s why I think Cece’s twin (who didn’t die) is working with A/being red coat to get revenge on killing her sister(maybe she thinks the girls killed her?) or to at least find out who did it.
As for the liars I think they remember more from that night than they think they know..I think they need to sit down and remember what they can from the night she went missing/ go back to the barn and see if it triggers any memories. I think that Ali had been planning her death long before she knew anyone was going to try and kill her. For example when she told Spencer she was writing her diaries for her “when I’m gone” I think Spencer knew that she was going to fake her own death hence the line in 1.01 “Your’e dead to me already” why did she say “already”? because its not like Alison was really going to die soon?
I think Spencer knew how Alison was going to do it but when it came about that she was missing and her body was found she assumed Ali really did die which is why she has been hesitant about believing she was alive until recently.