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.