Girls who are going through long term relationships break up does it get better?

I’m (24yo) going through a rough break up The relationship lasted 4 years and i feel lost i’m looking towards the unknown and struggling with familiarity with this person Seeing reddit stories about cheating partners and other failed relationships is scaring me It’s making me doubt if i made the right choice at some point i feel like i did because all the signs led me to this point but I can’t accept the idea that the person i’ve known for so long is going to be out of my life So what are your experiences? And how long does it take until it gets better?