I got out about 4 years ago at age 26 and I only did 4 years. I had such an amazing group of friends all around my rank. I had some lows for sure—mostly due to being in the Marines—hence why I got out. But my highs were also the highest. Now, I'm more emotionally regulated but have yet to feel that true happiness and belonging I felt then. If anything I just feel numb now. I was just now going through my photo album from those times and realized I have not laughed, smiled, or just felt the way I felt in those pictures in years. It really broke my heart. Right now I live in what people consider a top place to live because its pretty, people vacation here, etc. Back then, I was stationed where most people consider a crappy duty station...and I ache for that place more than anywhere. I'm worried I will never feel that happy or fulfilled again.
Edit: I really appreciate all the perspectives. I’m a woman and most of my friends were other female marines too, plus all the great male friendships I made. I think the brotherhood advice can still be applied, just wanted to point out we’re not all men.