Everyone is giving you the best info, I would only add that you need to find the best thoracic surgeon accessible to you, someone who has done hundreds of repairs in a major medical facility. Also a cardiologist who specializes in aortic diseases, not all of them do and it makes a big difference. Get evaluated by both and follow all their instructions. Ask all the questions you may have.

I had a 5.2cm ascending aortic aneurysm repaired 5 years ago, I was 54 years old. Mine was found while having leg surgery from a bike accident. My surgery was “planned “ as it wasn’t a dissection, and having a very experienced team made everything go very smoothly.

Keep your body healthy, stay active but avoid exerting per @moonboy’s recommendations. You want your body at its best in case you ever need surgery.

You know you have it and can monitor and plan, not everyone gets that opportunity, you will be fine.

All the best and keep informing yourself