No, no it truly won't and you'd have to be delusional to think otherwise. The only instance I can see that happening where it won't matter is if you've lived in an abusive environment with a family relationship so bad that they don't care. If you're going to CTB, one of the main things you have to actively come to terms with and accept is that your family, if it applies, will always love you, always care about you, and will always miss you.
They're not going to ever "be okay" nor will the pain "eventually stop". Sure, there's a possibility that they'll eventually be able to live but it's not so much that they're going to get over their grief of you but simply learn to live around said grief. If you're going to do it, do it, but accept that there will be impacts. When you have family that you love, and family that loves you, your existence is intertwined with theirs so deeply you're practically apart of them and breaking that entwinement will leave a tear where you used to be.
I apologize if my words come off as gruff or mean, but you deserve the honest truth. It's a choice, a very hard one I know, that you'll have to make because if you're going to do this you must be able accept the consequences of your actions.
I really do hope you're able to get pass those feelings of personal failure. I've been there, and I'm still there, and it feels as though feeling like a failure in all facets of your life permanently tinges your very existence with a rotting smell that only you notice and it feels as though there is no true way to try rid of it to the point it's as if there's no point in trying at all. It's a curse. I can't say "It will get better, don't worry!" cause that's insensitive and I don't truly know your circumstances but I just want you to know that I relate to the feeling of perpetual internal failing and how that can tinge your ability to manage your day to day. I know you said that there's a likely chance you might be able to push through, and I truly do wish that you can do it. I'm rooting for you!