What does introvert mean?
In the Big Five model, extraversion is described as one personality dimension. Introversion is usually used for the lower end of that same scale. The model describes broad tendencies in how we function, rather than two entirely separate kinds of people.
That doesn't mean a single behaviour determines who you are. You might enjoy dinner with close friends but dislike large mingling events. You may also want different amounts of social contact depending on company and situation. Notice what actually suits you in practice, without letting a label become a rule for everything you do.
Living with different social needs
One of you wants to book up the weekend. The other wants to leave it open. Try talking about the concrete situation before drawing conclusions about the relationship. “I want a quiet morning after the party” says more than “you know I'm an introvert”.
Make room for both people's wishes. You might go together but leave at different times, plan a quiet moment afterwards, or sometimes do things separately. These are suggestions to discuss, not solutions that fit every couple.
Put into words what alone time means to you
Alone time might mean reading, going for a walk, exercising, or simply not having to make decisions for a while. Your partner can't know what kind of break you mean if you just say “I need space”. Try describing both what you'd like and when you want to reconnect.
For example: “I'd love to spend this evening with you. First I'd like to take half an hour to myself. Shall we cook together afterwards?” Ask your partner how that works for them too. Clarity gives you both something concrete to agree on.
When you need different amounts of time to think
You might know what you think only after you've had time to reflect. Your partner might think by talking things through. Start by asking how you each work in that particular conversation. You can't read someone's needs purely from a personality label.
Try an agreement: “I want to give you a proper answer. Can I think about it until after our walk?” A pause becomes easier to understand when you both know if and when the conversation will continue. No one should feel pressured to talk right away, or be left guessing when the other will come back to it.
Discover the variation in your own needs
Think back to two social occasions: one that felt good and one that became too much. What was different? The number of people, the noise level, how well you knew the company, or how your day had been beforehand? Feel free to write down an example you want to talk about.
The exercise below helps you put a current wish into words. It doesn't measure your personality and gives no Big Five score. If you want to go further, Aivelyn's full profile describes more of how you function and what you prioritise in relationships.