You said that you talked a lot at first, which is normal, because everyone is unfamiliar and your temper is easy-going, so you will certainly be able to chat with everyone and naturally talk a lot.
But after a long time, everyone will know who has what kind of personality and hobbies. Some people with similar tempers and hobbies will become your good friends, while others are different, you can only be ordinary friends with them. This is normal.
I don't think you need to deliberately expand your circle of friends, because you can't force people to mix with people who don't look pleasing to the eye. It's pretty depressing.
In fact, a person, as long as there are 2-3 particularly outstanding.
People are so different, not many people will be fine.
If you really want to expand your circle of friends, you can only participate in more friends' activities, but I feel that you are even more uncomfortable because you may not like them.