How to Deal with an Unhappy Person

Hey guys, hope all is well.
The other day, I received this message from someone: I have recently gotten into a relationship. As naturally happens, I’m hanging out with my partner’s friends on a weekly basis. One of my partner’s friends is not the happiest or most joyful of people to put it mildly. She tends to be on the more negative and pessimistic side.
She obviously has happy and joking moments with her friends when making fun of things going on within the friend group or in the world, or when recounting fun memories from their past, but a lot of the time, she doesn’t really project a lot of happiness, smiling or love.
I am someone that tries to enjoy life and be happy, you know, I think we shouldn’t take life for granted. I find when I’m hanging out with my partner’s friend, I’m very aware of her more stoic/less smiling presence and her negativity definitely has an effect on me.
In interacting with her, I constantly feel I’m being judged and I find myself trying to make her more upbeat.
Any pieces of advice in terms of interacting with my partner’s friend? This is someone, most months, I’ll be seeing 4 times a month.
In this vlog, I give my 4 pieces of advice for the individual in this situation which I think also generally apply to dealing with unhappy people.
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