If you were in the Philippines, I would say that it's normal. Here in the Visayas they call it Olaw and in tagalog they call it Hiya...
Sadly here, we gotta put up with it.
I don't know what his problem is if he's in the UK and he's the guy in the relationship. Don't know.
Filipinos tend to get really shy, even the astig type (the tough guy). It's one of those things that can come off as rude to us Brits. I don't know what to say other than, if it's that, maybe he's very very shy, ... other than that, maybe it's something else, maybe something deeper.
Is everything OK between you and him -- as normal? If so, then it's probably shyness. If not, it's probably something else, deeper.
BTW, i haven't seen you here before, so let me say WELCOME
JimHub,