Something isn’t right with this picture...

So I love my bf to pieces and we’ve been together for almost 4 years in a few months. He’s 35 and I’m 29. He knows I want our relationship to go to the next level. I’m not saying I want to get married tomorrow, but being engaged after 4 years isn’t asking too soon or even much at all. I’ve brought up this conversation with him before. But it never seems to go anywhere. He always says he can’t afford a ring, among other excuses. But he bought a new computer a couple months ago and spends probably $60-70 a month on it, not sure if it’s for a year or 2 years, I’m thinking just one. And today he gets a new Samsung galaxy watch delivered to him. He says it’s only $15 a month for a year but I’m not entirely sure if that’s true or not. My whole point is, that he tells me he can’t afford a ring for me, but he goes and spends money on stuff HE wants (doesn’t need) and it makes me feel like shit. Just for those 2 items alone is around $80-90 a month. I mean people spend that much monthly on an engagement ring. I’m just tired of the excuses from him. When I see he gets shit like that, I just walk away now. It’s just annoying to me. I mean I don’t want to sound like a baby but I’ve already explained to him, what I want out of our relationship and obviously he gives zero fucks. I just don’t know if I can take this much longer. I love him a lot, but I can’t force someone to want the same things I do. Just makes me really sad...😞😞