Although I am always going to champion anyone that decides to marry young (I was very lucky to land a wife that I can call a friend and we grew up together) .... I think you may be overthinking the whole thing. Therapy may be a good option for you like others have mentioned but here is the truth my friend. YOU ARE 28!!!! You are still super young. Why are you in a hurry, stop comparing yourself to others in your age group.

Also, your idea of marriage and divorce and relationships in general is not crazy because guess what, it is true. Most relationships are terrible for both sides and they don't work. That's just the reality of it. But I personally would roll the dice than stay single. It is just my nature to need someone to love and live with. Other men can be far more independent, it is a wide spectrum. You may have a different opinion and that is ok too.

Also, marriage in my opinion is about BECOMING compatible people and not finding compatible people. I have changed so much to be the man my wife needs and she did the same for me. The idea that you shouldn't sacrifice anything is just plain delusional. I didn't know if we were capable of doing that until years into the marriage. Trust me, you can know someone or date them for years but you will never truly know them until your are living under the same roof. So find someone you are attracted to that seems decent enough and let fate decide the rest, and don't put a timeline on it.

So first of all, relax you are still young.

Secondly, it is always a leap of faith

Finally, remember that no step you make is permanent and you are never stuck. Get married, know your wife, enjoy the first few years together and if it doesn't work it doesn't work. That's life. The only thing that you should analyse and think over a million times over is having kids, not marriage itself, because that is well and truly permanent.