Oh, one of my favorite subjects ...
1. Nobody should marry before they're in their mid to late 20s, short and sweet, male or female. You're still a kid until that age (whether you think you are or not), but you don't realize it until you're in your 30s or so and look back and go, OMG, I was such a kid!!!
2. You can't be each other's WORLD. You need some space from each other, other than jobs. You need outside interests. My first husband was a total PITA, NEVER went anywhere without me, NEVER let me go anywhere without him, felt he had to be my shadow, felt we should do everything together BLECH. DROVE ME NUTS!!! Jesus I felt like I was being smothered. I got SICK TO DEATH of the man. It's nice to miss someone occasionally, and it's nice to have something new to share with each other occasionally. I BEGGED him for space, let me go on a vacation with my mom or friends, he would start nasty ass fights with me, acusing me of things I wasn't doing. I begged him to go do things without me and I'd stay home, he'd come up with excuses ... I knew, KNEW he was smothering me. I was just getting sick of the SIGHT of him. Any hobbies I took up, HE'D do, whether he liked it or not. It was like being married to the worlds most annoying little brother ...
3. Opposites attract, they don't last. While you need to have separate interests and personal space, you must share certain core values.
You don't understand and accept #2 and #3 above until you are no longer #1.