I could write a massive paragraph as to how intense this guy has gotten after only ONE 1 hour meet. From 'I love you & always will' right up to 'please see me again I will buy you a house deposit/make you my business partner/tell you my childhood traumas so you trust me etcetcetc.' HUUUGEEE ass paragraphs, emails upon emails about his life story & how much he loves me. I have told him the bluntest way at this point NO. I respond to maybe 1 in every 10 emails he sends. One to say I don't wish to further our meets because I am not a phycologist and can't give him the emotional support he needs' and another to be firm and say N-O in every way I could find. It's like his brain doesn't have the capacity to register no because he keeps giving me these 'offers', he seems to have a distortion of reality because he doesn't even understand he's doing something wrong in fact he thinks I should be gratitude to him.

 He seems to get hyped up even when I send him an email saying (more professionally) 'nooooooooooooo' like any attention is attention to him. Do I just ignore him and hope he fixates on something more healthy? I hate this part of the job ffs why can't they just hire phycologist it's so tiring managing these folk.

Just block and move on, these people exist to eat up your time and you'll always get fantasists and attention seekers trying to get you drawn into their super long emails. I've honestly lost count of clients who told me they love me or offers of marriage, one client even fed me some long story about how he's moving to New York to take a job and wants to take me with him to live there.

Some people you meet will be lonely guys and you provide a reprieve from that fact by providing them with a short term fantasy and some get attached to the fantasy and don't want it to end. It's not always easy to accept for these types that you're doing a job because they are paying you and all the things you do and say aren't real.

the only message you need to send him is:

"I told you a while ago I do not wish to be contacted, but against  my wishes you keep harassing me. Any more e-mails, text, calls etc.. and I'm going straight to the police to fill in harassment charges against you.

Please do not respond to this message"

Then you keep all his text.s e-mails etc... and if he persists you go straight to the police.

By even responding once in a while with no,you are making it known you are reading his messages and giving them (and him attention).
Just block his email address and let him whitter on to himself.

Clearly, he's needy, lonely or in rebound (the same thing), socially awkward, inexperienced or a mixture of the above.  He's projecting his hopes and dreams in you, whom he decided you were his "dream girl/perfect lady". 
As you know we all have faults ourselves.

This happens to loads of women in escorting or in dating.  These men don't stick around.  As soon as he finds you had some faults/weaknesses, he jumps ship.  I agree with TA, they do tend to eat up loads of time.

First of all I would do this:

By even responding once in a while with no,you are making it known you are reading his messages and giving them (and him attention).
Just block his email address and let him whitter on to himself.

If he finds any way to contact you again (for example by going to your house), I would contact the police:

..... if he persists you go straight to the police.

They are after ...*gulp*........  sex, usually, on demand.  Oh, no, I was wrong, this may ALSO involve, oral, anal, God knows what else, without payment.   

I am currently dealing with a client that started like yours. He is now trying to blackmail me. Saying he wants his money back for a previous booking as I refused to see him again. People like this are crazy and obsessive. I'm currently in contact with the police regarding my situation. I wouldn't go to the police straight away. First maybe explain that harassment is an offence and you'll do something if it doesn't stop. These things are awful when they escalate.
I got a ton of advise today at the sexual health clinic regarding my rights as an escort ect. There is help out there and officers are obliged to help if you are a victim of harassment.