Partners are supposed to focus on each other. You need to stay connected to maintain your relationship. Your care and attention can make your bond last for years. Once the partners stop caring, their relationship starts to fade away day by day. Do not let it happen.
Your partner might be an introvert and have a relatively reserved nature, but there will always be a sign he/she wants to get closer to you. Here is what you should pay attention to:
Your partner makes more time for you
The amount of time that you are ready to invest in the partner tells a lot about your feelings. You love your partner if you schedule your day in a way that allows you to spend plenty of time with your significant other. The only precious thing that is not sold is time so appreciate it if your partner spends it with you.
Your partner asks you tons of questions about yourself
Learning something new about each other is an endless process. Do not be surprised that the person you are with keeps asking various kinds of questions. This is how your partner is trying to find out what sort of person you are.