Hi Simon,
This sounds very painful.... I'm sorry!
I think Sky has made a good point that your intense feelings for Laura could have something to do with the death of your mother (my mother is dead too)
I would go very carefully........you've already been very hurt by her and some of the things you've said bring up big red flags for me ...."4 months into our relationship Laura ended it, just days after telling me she never wanted to end it...." and I don't like the feeling I get about your recent text exchange either, although maybe that is just me....
I wish I could be more encouraging on this. Take good care of you!
Fuzzy