When a boyfriend/girlfriend or even a friend is always showing you love and affection. This isn't a bad thing, it's showing that they care about you. Like when they do simple things like say "I love you" or hug you or complement you or help/listen to you when things are rough. Being this type of clingy is far from bad.
Brad: Yo, is that Jade chick a good clingy or like the bad kind??
Dakota: She's definitely the good kind. It's so nice to have her around, I love her so much...