I'm 57 and still grow my hair out long. I just prefer longer hair and at my age, I'm glad I can still grow hair. I've had long hair on and off since I was in my early 40s.
The first thing to do is to get rid of the split ends. It will make your hair hang down more smoothly, with less tangles. It's time you go to stylists, as they are used to cutting long hair on women. Most can be trusted with men's hair styles. So, keep growing your hair, but have it groomed occasionally to give it a good style. Have it layered, so it'll lay better on your head. Just because your hair is long doesn't mean that it can't be styled. You don't have to look like a grizzled old biker.
Use hair bands to hold your pony tail back, it's useful on hot days. Use conditioner when you shower, it'll smooth out your hair. Look into dry shampoo. It's a spray-on product that removes the oils from your hair, on the days you don't feel like washing your hair.
Some women love long hair on men, most don't. Make sure you do this for you.
I love my hair long. I like feeling it brush across my face when the wind blows. It just feels "alive." You'll find yourself brushing your hair out of your face a lot, but it feels good doing it. It'll become a habit, even if you revert back to shorter hair styles.