It sounds like you have grown tired of the long hair thing and, though you see it as part of your identity, that identity seems to be changing and you are now wanting convenience. If you don't like it short, it will grow back in due course so there is really no risk. The summer is the time to have short hair which is MUCH easier to take care of and more comfortable in hot, humid weather. Research how you'd like your cut hair to look and go to a good place. Be forewarned that you will look different but you will adjust to it in a few days. If the convenience of shorter hair is appreciated then you might keep it that way. It is not unusual to get tired of things you've had your entire life. Life is about change. Embrace it.