Hello, I am Rafael. Thanks for asking your question - I'm here to support you. (Information posted here is not private or confidential but public).
I am sorry to know about this situation.
What do I do?
It's very clear you like this person, but on the other hand he is giving you concrete reasons why he does not feel the same around you staying there because of him.
he is telling you he has an issue with a "2" years difference", that's very concerning since it is not about you being much older than he is, but it is an issue and valid reason for him to tell you to go back to London...
...also he is telling you that for him it is to early to know what would happen with this sharing that you have had in the past months. again this is very different from the way you feel. But I have to agree that for a person in your shoes, even after officially dating a new person for 6 months and having him wanting you and supporting your relocation there, it would not be a good idea because of the brief period of time you had to know each other. In your case, it's much more evident that besides of how early it is for you to know each other well enough to make dramatic changes like international relocation, he is openly telling you that he does not think you should stay for him at all, that you are too old for him and that he has other girls to contact because of the way his parents-culture promotes that.
Thus I would never suggest anybody in your shoes to take such a huge risk when so many clear limitations and concerns already exist, since you would be leaving your support system, family and friends, and your social network and life back in London for something that is clearly not welcoming you, unless you were willing to afford the very possible consequences of being there alone, that this "sharing" does not lead to a serious healthy and fulfilling relationship with this person, and having to go back to London or work from zero on rebuilding a life in a new place and culture, with all the challenges it would imply.
Does it make sense?
So you don't think it's worth me relocating?
I do not think so at all based on the reality you described in your message.
But it you were willing to afford the consequences, then go for it, but just be totally aware of and take full responsibility for your feeligns, choices and actions, since everything here points at this not leading to a mutually healthy and fulfilling relationship.