jammie, i am glad you have sent that message.
because given what you have said, this girl has done nothing wrong - except get sick of someone who has emailed, phoned, texted and turned up at her house completely unwelcome, and as you said ''over reacted'' and then after a break, looks like they may be starting it all up again - if it was me, then i am afraid you would have got a lot more than two simple text messages requesting to be left alone!! you got off lightly.
you are interfering and intruding on their life and you are not welcome - that is blatantly clear.
i realise your feathers are ruffled, but think about hers? how would you like a girl to do what you did to you and your new bloke?
if you had not previously done all the phoning and texting and emailing and turning up on their doorstep in a strop - then a ''simple text asking how he is'' would indeed have been acceptable and probably got a polite reply, and would not have caused any issue, but given the history here, i cannot blame her for not wanting it to all begin again.
so well done for doing the right thing.