I used to live in St Columb Major, about 8 miles from Newquay. I loved every minute of my years there and made many friends ia clubs, societies, church and social events. .
Many Cornish towns have their own Facebook pages which give details of social events and you could join the Old Cornwall Society which gives a fascinating and wonderfully social insight into the culture of Kernow, God's Own County
St Columb has Victorian Week in August, always very enjoyable so don't miss that but I think you'll find the libraries have lists of clubs and societies you could join when wanting to make new friends.
You've made me quite homesick talking about Cornwall 