What an absolute bastard!
He’s utterly despicable!
I don’t know what possessed you op to move in with someone who had rejected you romantically - that was always going to be unworkable and leave you vulnerable - but boy has he taken advantage.
I would ask him to leave right now (don’t know what the terms of your agreement are) do give him notice if you have to, but I am worried that someone as unscrupulous as him, knowing that he has to leave, would take all of your valuables, or your bike, and take over the place and lock you out, or something hideous like that.
I would go and ask for advice from CAB or someone who knows where you stand legally.
I know you don’t know many people where you are but start inviting other people over to your flat, especially tall, big, strong, male people! Do you know any guys in the services or police? Rugby players? Coast guard?
I would be telling him you want the £600 asap as you were lending it him solely so he could see his son and that he has lied to you about that.
Of course he will accuse you of jealousy but be prepared and immediately say,”believe me, the reality of living with you has wiped the scales from my eyes; I don’t even want to be your friend any longer”
Go grey rock. And get him out of your life as soon as possible. But be very careful op. These types who are takers can turn nasty all of a sudden when you cut off their “supply” and finally put a boundary in place.
Get some outside support with this please. He has preyed upon the fact that you are isolated and that makes you vulnerable.
Agree with pps that you sound like a lovely, brilliant person op and you deserve so much better. 💐
If you have not already done so, do not give this awful man details of your home which is being renovated. Once he moves out of your temporary flat, block, block, block.
And look forward now and instead of clearing up after this prick, and looking after his puppy, invest your time and money in developing a life near your new home and joining clubs and meeting people.
And op, do not be tempted to keep the puppy. This will be hard. You can give it to a shelter or agree with the prick freeloader to find it another suitable home, but do not keep anything that will tie this guy to you in the future. Please don’t sacrifice your own happiness on this one. The puppy of course needs to be safe but you also deserve to be safe and totally liberated from this malign influence in your life.
Finally, maybe see a therapist and work on why you became vulnerable in this way. You are obviously brave and highly intelligent and resourceful to be able to find such a great job and to have come through a break up and a house flood and still have inner resources left to help someone else, but your selflessness was directed at the wrong person and you neglected to be kind to yourself! Maybe explore why this happened?
Take care op and proceed with caution but kick the bottom feeder out!