There is a lot of pressure to become super close with your first year flatmates but that doesn't always happen and that's ok. Does your friend from home also go to your uni or are they just staying with you? I'd say while you shouldn't ignore them you should try and focus on yourself a bit more and try and meet people independently of your friend. If they are just crashing with you, then I think it might be time for them to go home - your flatmates might not be liking having an extra person in the flat or they might think that you aren't really interested in making friends with them.