Is OTHER wrong in the post ? POST : A bit of backstory: He and his gf moved recently and I helped them a couple days to renovate their new place and get their stuff into their new home. He was also unhappy with his current job (truck driver) and since he was always interested in computers I started teaching him programming and got him an apprenticeship at the company I work at.

After above mentioned things were dealt with, everyday life began to settle in again and I'd frequently visit him as usual. The difference now is that we don't have a dedicated room to chill in and play video games together and talk about private matters. Everything is now in the living room, with his gf visibly annoyed and more people visiting now since a good friend lives in the same apartment complex, so things get a lot easier heated nowadays.

I'll be moving into a new place in 2 months and asked my friend if he wanted to help me with planning the apartment and such since he is experienced with that. He said yes and we waited until the floor plans arrived. 
I asked him multiple times when we wanted to go to some furniture places together to get some ideas (I wanted him to come with me since I want to make one of the rooms I'll have our dedicated place again, but this time I wanted it to be like a thing we designed and made together). He postponed the date when we would go multiple times because he either forgot it or wanted to stay home because he "doesn't like to go to furniture places and just wants to chills at home", which got me a little mad yesterday because he's on sick leave since two weeks (he isn't sick) and has been playing games since then (which imo is perfectly fine, but weakens his argument of wanting to chill imo).

As soon as another friend came in and got wind about that we want to go to a furniture place, he immediately said that we should totally go now, but then realised it's late so we should go the next day then.

I later called him out because that's not the first time this happened (like I asked him for something to do outside, he says no, but as soon as someone else would join, he says yes) and told him that I sort of feel disrespected as if I wasn't good enough of a reason to do something outside of his comfort zone.

He just replied "dude, seriously?" and now I'm sitting here wondering if I was wrong and the asshole for getting mad and / or overreacting or he is.

I hope someone takes their time to read and reply to this. Constructive feedback welcome, especially if I did something wrong. I'm not very good at socialising and would love to improve.

Sincerely,

John.