We have known each other for three or four years. We always talk about marriage. My girlfriend has changed recently. Tell her not to think too much. I need time.

You've known each other for three or four years, and it's time to talk about marriage. When your girlfriend has an abnormal situation, there may be the following situations. Maybe something has upset her recently, but you don't know it yet. Then, you're getting married. You have a phobia before marriage. She needs time. At this time, you should understand her, trust her, give her more care, give her time, and make her feel that you are someone she can rely on.