Sorry you're hurting OP
The text message thing is very rude - after 5 months, a holiday, and sex, why wasn't he suggesting meeting, or talking on the phone?
I do wonder if there were some unspoken signals you didn't pick up on earlier?
Was everything always 50/50 in terms of effort and communication and paying for things? What did you do in your time together? Was it more fun social things?
When you say he was empathetic and supportive was this actions (physically turning up to do something inconvenient for your benefit only) or talk/texting.
Was he integrating you into his family and friends?
I've learned the guys who really like me try to do more than expected, or everything.
Its not verbalised or negotiated.
They categorise me as someone they're serious about early on, then I'm their priority person.
I don't need to convince them how easygoing I am, they try to fit into my lifestyle and interests.
Their friends and family know who I am even if we haven't met, or they'll try to get me along to an event so their friends can see me.
They'll give me access to their home environment so I can have a key or see them any time. They want to send the message they are available.
It's not love bombing or lots of gifts or being a simp, but I know that if I messaged them with some random unreasonable request or some boring menial task they'd want to do it.