You can't fake friendship. You will have to take a genuine interest in that persons life, this is usually achieved easier if you share common interest. But if you feel so inclined as to fake the funk because your interested in wanting to try new things. Just remember to ask them questions try to avoid talking about yourself, inless they ask. This allows you to learn about them and their interests, while also gaining trust and admiration from your potential friend. Everyone loves to talk about themselves and their life rarely do people want to hear about some strangers life especially if it involves misery. So to be frank if you want to make friends be positive, uplifting and above all a better listener than a talker. Eg. "My dog died". "Mine did too he was a bulldog named roxy". Even though your intention is most likely to find a common thread, this isn't important, (not now at least) instead "I'm sorry what happened, or how old was he, what was his name" etc. Is the best way to continue. Just keep them talking about themselves. Ps this is a great method for picking up chicks btw.