How to reconnect with an old friend?

Hey you guys, I'm not sure if you have any advice or tips for me or maybe you're stuck too, but I wanna know how I can reconnect with an old friend of mine.. We knew each other since elementary school, we've been best friends ever since. We had our fights in middle school, high school but we worked it out and had fun. It all kind of just quietly drifted away when I started dating my boyfriend whose I'm still with to this day. He's also friends with her too, shes basically the reason why I got to know and fall in love with him.

I'm at fault for it you know, I ditched my best friend for a guy and I feel bad because I just left her you know. And i'm angry at that because my life sucks right now. I've grown to gave problems, problems I believe mess with my mental health. I'm always anxious, I get sad a lot and angry. I have a lot on my mind and shit I wanna talk about but I wish I still had her friendship and trust.

Making friends is hard for me, I'm shy and could hardly keep up a convo. But I wanna be able to text her you know and be like "Dude I'ma pick you up right now, we're gonna get ice cream" or "Movies rn, I got you" you know?

I just want a friend..