Some people are a bit high-strung, while others have a reputation for being far more easy-going. That's just their personality. But it can sometimes be hard to tell if someone is truly just flexible, laid-back, and easy-going or if they're indifferent or don't really care about things. In a relationship, that differentiation really matters. And there are some signs that your partner's easy-going personality is actually a sign they don't care enough that might help you determine if they're really, truly easy-going, or if they're not as engaged in the relationship and your life together as you'd hope that they would be.
Life with an easy-going partner can feel relatively easy because they tend to take things as they go and are a bit more flexible than other people. That can, of course, become an issue if you're both really easy-going, but if you're a bit less agreeable than they are, they can provide a nice balance. But you still want them to care about the relationship and be invested in what the two of you have going, so it's maybe not all that surprising that you might want to be sure that that's really their personality. There are a few clues that they might give you, so knowing what to watch out for can help you figure out if that's just how they are or if you might need to re-evaluate things or take action.