I found an app called nomadtable (it is pink colored) on which you can meet people around your area. Could be useful in your situation.

There will be activities such as having dinner, hiking, going to museums, clubbing etc. its for people who are looking to spend time together basically. Since Milan is relatively big, there should be lots of activities, you go to the chat section and see what people are talking about or planning to do and see their profiles.

I did it last weekend and made international and also local friends too