JOIN ENGLISH CAFE!
Absolutely, the easiest and happiest way to make new international friends in Malta is participating in one of the many meetups and acitivities of English Cafe Malta which take place almost daily! These guys are working since 2014, with more than 500 events organized so far and average of 100 people attending each meetup! It cannot go wrong!
The good things of their events is that they litterally fit any need. There are people from all age groups different level of English (from native speakers to beginner), different backgrounds (from students to professionals).
What else? Great locations, welcoming people, good prices! You just need to visit their website or better their events!