I'm not enjoying living in halls but I'm worried if I move out I won't be able to integrate into my uni? It's just they're not including me in their activities and I feel like an alien. Has anyone got any advice? Should I stick with my hallmates?

Maybe you can try and arrange a dinner with your flatmates? Have you tried to take initiative?

Me personally, I greatly enjoyed to live in halls, and I got some very good friends from there. I think it takes quite some work though. I would say, give it some more time and try and reach out to them a bit more. You never know what might happened!

Good luck :)