Reconnecting with an old best friend

So I don’t know how to go about this. I feel really heavy on my heart lately to reconnect with her, a heaviness I haven’t felt before since we stopped being best friends a year ago.

Here’s what happened. I was in a time in my life where I was going through some major anxiety issues my sophomore year of high school. I felt like she wasn’t really there for me anymore and I was so caught up in my own mental health issues I truly couldn’t be a friend then. So I cut her off, ghosted her basically. My fault 100% and I know this. She hasn’t made an effort to reach out either, I don’t blame her. Nothing bad happened no bad words or feelings were exchanged, I just ghosted her. Just like that. This was a year ago, and we are going into our senior year of high school this year. Recently, I just feel it so heavy on my heart to owe her an explanation and try to rekindle the friendship. But, I’m scared. I’m scared of rejection and the fact she has so many other girls now she considers best friends so it has me thinking would she even want anything to do with me? Would I just look stupid texting her? I don’t know. Advice please !