You find the agent... and do a little background check on them... ask people what agents are best... never let her be the middle person unless your both present!!
I understand I drove trucks for a few years in the States .. and I honestly be a little nervous about living in UK at that moment!! So yes probably better that way I guess.. if can make it work hats off to you !! 👍🏾
Bring her to you if it's that serious... than come back to Thailand when your ready... if she's not willing to come to you than it's not serious unfortunately!!!