How to ask my boyfriend without arguing?

So I’ve been overthinking a couple things my boyfriend did recently and I don’t know how to bring up the fact that I’m overthinking these things to him. I want to tell him what is bothering me but I don’t want it to turn into an argument about me “always overthinking” or not trusting him.
I recently made an Instagram and I told him I was gonna follow him bc I made one and he said “why?” Like wym why dude just accept my request why is that weird I’m your girlfriend? And he waited until I left bc I was upset he was not accepting my request to add me back. Funny thing tho was he was following 411 people and when I looked back at him accepting my request the count went down to 404. Was he following girls he shouldn’t have been following? Why did he question my request so much and what took so long to accept it?

He also has his old phone in his drawer. I didn’t think anything of it but my phone died the other day while I was working on an assignment for class on my phone and he was using his laptop and phone for work. My laptop was at home so I asked if I could use his old phone to log into safari real quick and turn my document in. He seemed really weird about it and kept saying it didn’t work (even tho he had told me before it was in great condition) and he let me use his laptop really quick. It stayed in my mind so I decided to keep a mental note of where I saw that phone. Over the last few weeks it keeps changing places, almost like he uses it a lot and then turns it off and puts it away.

im overthinking both of these situations so much and I hate it bc other than these little weird things he treats me very well and I can tell he loves me (hopefully?)

how do I even talk to him about these? Should I just rip the bandaid off? How do I word things without sounding accusatory ☹️

Updates
1 y
I know they sound like little stupid things but they add up and they bother me. My emotions and feelings are valid and I won’t let anyone tell me they aren’t. I just need help in going about the situation in a good way for him and I both.
How to ask my boyfriend without arguing?
Post Opinion