Is my best friend a narcissist?

actually i take that back after rereading he does seem to be one. im wondering why on earth you have stayed friends with him this far though?

Hi there, I just need a second opinion because I feel like I'm going insane.
I have strong suspicions that my closest friend since primary school (we're 20 now) doesn't treat me like a friend should and is also a bit of a narcissist.
It feels like he's always trying to exaggerate anything I do wrong, then also play down any success I have.
We started a company together (50/50) when we were 16 and 1.5 years later I convinced him to sell his shares since he wasn't putting much effort into the business at all (I left school after GCSE's so I was doing it full time, while he could only dedicate an hour or two a day as he had A levels). He sold his shares for £2.5k because that was market value at the time (very small company).
I grew the business with other partners over the next couple years and ended up profiting around £100k from the company which he knew. I think from then on he's always been trying to "compete" with me. He tells me that he makes £120k a year but he's a junior software developer at cloudflare then cisco while in his second year of open university.
Whether this is true or not I'm not fussed, but what I care about is he definitely makes it well known to people by constantly telling people how much he earns. He has an American Express card and will try to make everyone see him holding it before tapping the card reader (cringe I know), I sometimes make a joke saying "don't you have Apple Pay" and he just plays it off.
When he sold his shares for £2.5k he told everyone at school he sold them for £150k I think it was, then because people knew we owned a company together everyone thought I was rich (I'm not and back then the business wasn't even making money).
Some other traits he has are:
- Like to brag about how he has control over a friend in our groups finances (they think he's rich so let him have logins to their ISA to "control it").
- He used to control my passwords when I was younger (age 9 - 14), I don't know why I let him do this but I would never of been able to know his passwords.
- He likes to take pictures of people when they are in vulnerable positions, drunk night out embarrassing moments, pictures of friends naked in Magaluf when it was just drunk antics.
- He is very vocal in making sure people know their weaknesses.
- He has to be right 100% of the time, being wrong isn't an option for him - he will just lie or backtrack to cover up being embarrassed of being wrong.
- He likes to have important things in his possession, ie holiday bookings, taking Airbnb keys, cloning keycards to peoples flats.
- Likes to know who our friends are texting when they are with him, peering over shoulder when on phones or at ATM's.
- Doing things to get in the way of me and my friend having 1:1 conversations with each other - always wants to know what we are talking about.
A very strange situation was when he kindly took us out to dinner, and then got the bill (it was $209 AUD), then proceeded to tell us it was $279 AUD) - we weren't even splitting it as it was on him, but its an odd thing to lie about. He will use the fact that he paid for our dinner like a bargaining chip - "oh well I paid for dinner so I can poke you".
Something I've picked up on recently is that if there's 3 or more of us hanging out, and I say something funny to my friend or both or them, he will copy what I just said word for word. He usually does this when im telling a joke or say something factual.
He also likes to centre the conversations around himself, he doesn't have much to say about something if it's not about him - and will quickly change the topic to something he's more knowledgeable or passionate about.
I think the main reason I haven't distanced myself from him already is because we've been "best friends" since childhood. But I have plenty of friends that make me feel good while speaking to them, whereas speaking to this friend it's either making a big deal out of mistakes I make, downplaying / non genuine reaction for my wins, or arguing over small things because he's lied about something and can't admit he's in the wrong.
I think he might feel like I've "overtaken him" and is trying to bring me back down to a lower level, but I'm honestly not sure. All I know is that when I'm around him he ends up making me think lower of myself.
I like to empower my friends and would never think of treating them like this, and I don't want this to rub off on me - I suppose I'm looking to make sure that ending this "friendship" is the right thing.