Just a mini vent

Lately I feel like me and one of my best friends has been drifting. It’s not a big deal and I’m happy she has other friends. Unfortunately for me... she’s my only main friend I talk to often haha. I’m kind of looking for friends on my own but I’m on the shy side so it’s hard for me to instantly click with people. I’m not too sad about it because it doesn’t mean our friendship is over, it’s just we’re not as close as before.

Anyone have any tips on how to get close friends you can hang out with and just tell your secrets to? I don’t know why it’s so hard for me to instantly click with others :/