What is going on? What should my thoughts be? How do I know if he’s being honest? Why is it that he prefers to mostly talk on Snapchat and text?

Long story short we have been friends for five years. We went on a first date five years ago and then we decided to be friends. Because him and I decided not to date immediately, then we decided to get serious 8 months ago, and then in between we took a slight break of about 2 months because he needed some therapy which I gave him space for, then came back together, then started seeing each other seriously back in March, he knows I’m getting impatient.
I have asked him now 3 times if or when he will make me his girlfriend because it has been 4 months since we started seriously talking and I have made it now a goal that if he doesn’t ask me to be his girlfriend within the next 3 weeks that I’m gonna call it done but I’m not sure if I’m making the right decision because everything that I’ve asked he is taking seriously, now I’m worried, because whenever I ask for things to get serious like in a way he freaks out & he doesn’t mean to, but he kind of pulls back off / starts talking to his friends or maybe other women, I’m not sure but he swears up & down even he gave me his passcode to his phone when I asked what it was & I told him he needs to be more open w/ leaving his phone out. No secrets.
I need to see that he is as loyal & honest with everything as much as I am & if we’re gonna be spending this much time together, he needs to let me more into his life, when he’s doing the FaceTime & the phone calls, but separating his life from me & also claiming that he’s as loyal as loyal as I am, but he’s also secretive, & also not secretive & open at the same time. There are times that I’m worried & there are times when I’m very happy & I know he’s being loyal & other times it makes me question things. I’m worried I’ve wanted this for so long & I’ve been more than patient & I don’t know what to do. I do love this man because I’ve had feelings for years & I feel like things are going in the right direction because he’s worked through a lot. He wants to take it slow.

What is going on? What should my thoughts be? How do I know if he’s being honest? Why is it that he prefers to mostly talk on Snapchat and text?
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