Trust, honesty, and respect....having fun together, laughing, and snuggling....gotta snuggle!
My definition of a healthy realationship ( and I've had lots of unhealthy ones ) is being with someone who accepts your past , supports your present , and encourages your future. Also it's important to be with someone who makes you laugh !! A LOT !! And if he buys you a pony that's gravy .. Pony optional .. Kinda. The first part of my answer is what matters though . I still want a pony 😡
One that withstands the test of time with all its challenges
Profound, complex and simplistic all at the same time.
Personal space. I've seen way too many relationships go downhill due to one person being way too clingy. You're two different person. If anything, it may be your minor differences that brought you two together. Nobody wants to spend the rest of their life with their exact clone. With that there are different needs and different interests that each person should address.
Many people won't agree that alone time is healthy in a relationship. This brings out all sorts of clingy, which damages the relationship.