We have made an effort to avoid anywhere where she is as its still quite raw for everyone
she knew well we were going to that venue as she had sent a message to my boyfriend telling him that she would be there, ergo we shouldnt be!
and has on occasion contacted my boyfriend to tell him that she is going to a particular place, ie Im going there so you cant. We have changed plans to accommodate that
So how come you ended up in the same wine bar on this occasion?
"His excuse for what she did is "perhaps her friends were letting her know you were in the bathroom so she wouldnt go at the same time". Sorry but that just does not ring true"
Why not? It seems entirely logical that she wouldn't want to be in a confined space with you at the present time.
"but I cant and wouldnt behave that way towards his new girlfriend. Certainly not if that lady would be around my children"
Are you around your boyfriend's children? Or has your boyfriend not yet introduced you to them?
"oh Agent please stop, there is nothing teenagerish about it - the woman had me watched in a pub - she is 45! come on now, thats not normal behaviour."
Age is no indication of maturity and, given the circumstances, it seems enitrely normal to me. Why the insistence on her age, and the age of her male friends? How old is your boyfriend and you considerably younger?
Whats weird about all this is that she seems more interested in me than in him, commenting on my clothes, hair, my age, the fact that I used to do a little modelling
Nothing weird about that at all - sounds as if she's put you into the category of 'the slapper who stole my dh" which is an entirely normal knee-jerk reaction when a long-term partner leaves home and takes up with another woman. BTW, is the fact that you "used to do a little modelling" a stealth boast or are you trying to convince your audience that his ex is not a patch on you?
"I have had issues with him trying not to "rock the boat" where arguments are concerned regarding her, trying to keep the peace etc."
If his ex is history, and you are laying claim to having a mature attitude to affaires l'amour, why would there be any need for you to argue with him over her?
"It may be selfish of me but Im tired of feeling second place to her feelings"
This would seem to be the crux of the matter. It's about you, and unfortunately you seem have scant regard for the feelings of others.
"I would dearly love to call her and tell her that her behaviour is unacceptable and that I dont wish to have any of her friends watching me on a night out.
I bet you would, but I suspect that you know that if you did you'd create more bad feeling for all concerned - and that, of course, includes yourself.
"I have somewhat of a sixth sense/gut feeling about things and this has made the hairs on the back of my neck stand up."
Is your sixth sense telling you that, for whatever reason/s, you're being attention seeking in creating a drama where none exists?