1. You'll Know Exactly What the Other Person's Thinking, All the Time
You don't need to bother trying to read your own best friend's mind because you already know what he or she is about to say. So while a relationship with somebody new often involves a lot of overanalyzing and sending nerve-racking texts, you won't have to play the guessing game this time around.
2. Having Sex Is Funny . . . at First
After exchanging so many stories about sexual encounters you had with other people, you probably never imagined you'd be doing this with each other. But you're comfortable enough to laugh at the fact that, yes, it's happening now, and it feels pretty wild. But after you've been intimate a few times, the giggling will subside, the romance will kick in, and the sex will probably be pretty darn good.
3. You'll Wish There Were More Hours in the Day
Time: you're going to want more of it. At first, you won't be able to get enough of each other. Now you can do the things you've always done as friends and things people do as more than friends. While you'll want to spend the whole day together, there are other people in your life who need your lovin' too, like family and the rest of your buddies. Don't forget it.
4. You Won't Stop Making Fun of Each Other
If you've always made fun of his obsession with that one childish video game and he's always picked on you for wearing that "weird" man-repelling top, it's not going to stop now. The only difference is that the teasing will probably end with a kiss on the forehead instead of a playful punch in the arm.
5. There's a Constant Fear You Live With
You could lose the most important person in your life — the one who plays the part of your best friend and boyfriend or girlfriend. If you're fighting with him or her, you might have to tap your mom or another friend for advice. You try not to think about what would happen if this all doesn't work out, but sometimes you do, and sometimes a mighty pang of anxiety comes along with it. Read more on popsugar.