Nick gets a lot of (well-deserved) credit for being an amazing boyfriend to Charlie, and we know by now that he's a great friend, too. But what's almost more interesting to me is the underlying core personality trait that enables him to be both of those things--his emotional intuition and intelligence.
You see this in the comics mostly through Nick's facial expressions (no one can look worried like Nick Nelson can), but the show takes it a bit further. He's incredibly in tune with Charlie almost from the get-go. Nick watches him for small emotional cues and recognizes what they could mean, most notably before the confrontation with Ben after rugby practice. He reads between the lines of Charlie's deflections and falsely cheerful texts and pushes (with trademark Nick Nelson sensitivity) for the truth. He notices when Charlie is beset with intrusive thoughts, even if he doesn't know (at least early on) what they're about, and proceeds to interrupt those thoughts. He can read Charlie so well not only because he pays attention, real attention, but because he already has the emotional intuition required to interpret Charlie's inner complexities.
There are many moments throughout the show where we see Nick display this keen insight with everyone in his life, not just Charlie. When Elle, who he barely knows at this point, is upset about being set up with Tao, he immediately seeks to alleviate her distress by offering a true explanation of why she and Tao were invited in the first place--to be part of a triple date. He wants Elle to know that it was important to him (and Charlie, Tara, and Darcy) that she and Tao be there not just to try to set them up, but because they wanted to include them in an important step for both couples (Nick and Charlie just beginning to share their relationship, and Tara and Darcy trying to find acceptance after coming out as a couple). Nick knows that Elle values truth and honesty, and he gives her that so she can feel comfortable with her friends again.
Nick is also incredibly understanding of Tao, who, it has to be said, barely even understands himself for much of the show. There are a lot of scenes where Nick is trying to connect with Tao but maybe oversteps just a tad because he sees more of Tao than Tao is ready to have seen. The moment outside Charlie's house when Tao tells Nick about Elle's art college ambitions, Nick cuts through to the heart of the matter--Tao's concern about missing Elle if she's far away. Nick is the first person in the friend group to connect the dots about what Elle's college acceptance might mean for Tao, and immediately tries to help Tao process those feelings. He's met with anger, but only because he managed to hit a lightning bolt of a nerve in Tao's emotional storm.
And of course there's Imogen, who Nick has known for a long time but begins to understand and appreciate on a deeper level as their relationship moves from superficial connection to true friendship. He sees how sensitive she is, how lonely in some ways, and is always looking out for her, keeping a concerned eye on her. He gives her the space she requests, but also comfort when she lets her walls down enough to ask for it. His innate understanding of what people need--especially when what they need is just someone to be there--is impeccable.
It almost goes without saying, but Nick's emotional wavelength with his mom is similarly strong and nuanced. When Nick comes out to Sarah, he makes sure she understands how important it is to him that she knows--not only that she knows that he's bi, or that Charlie is his boyfriend, but that she knows him. That their relationship is so important to him that he can overcome his fears to share this most vital part of himself. Nick's value of Sarah extends to caring for her when she's dealing with the stress of having his dad and David around. Of course, Nick is still a teenager and there are a lot of scenes that show Sarah's deft handling of Nick's emotions, but it's a two-way street. Nick takes care of her in his own way too.
Nick starts his relationship with Tara and Darcy leaning on them for advice and guidance, but by the end of the show they're leaning on him. Nick sees their struggles, especially Tara's, possibly more clearly than anyone else does because he recognizes some similarities between their situation and his with Charlie. When they're in trouble, he knows Tara needs care and honest advice, even if it's not the most comforting advice. He knows that what they both need is strength and security and tries, in his careful way, to give them those things.
Nick Nelson, always looking out for everyone he loves, keeping them safe as much as he can, hugging them when he can't.
