How often should I call my ex-crush

Me( 18FM) and him(19M) live in different states. We are friends, and about 2months ago, I flew to his city and stayed for a month to see him. We hung out everyday even though he was super busy about work. Before I that trip, I only saw him as a friend, but during the trip, I found out that I have feelings for hjm, and told him about it because I knew he see me as just friend. I just wanted to be honest with him, and I cried a lot, but after then, we just hung out normally as we did before. And i really thought I’m over that feelings, I could see him as just friend. But on my way to my city, on a flight, I started to cry a lot and that’s the moment when I knew I still like him and i can’t see him as just friend. So after I landed in my city, for a month, I didn’t reach out to him at all. Since he’s super busy about work, he didn’t reach out to me too. So we didn’t talk at all. Because I was in a grief, I was so depressed that I can’t do anything but thinking about him all day. But recently, it’s been almost 2months since the trip ended, I feel better, I don’t cry anymore, and I don’t feel that much sad. I thought I’m ready to see him as just friend again, so I texted him that I want us to chat sometime. And he responded really quickly, and responded with “Yes I want us to catch up!”. I’m so happy about it . But i don’t think it’s good for me (and us) to talk like we did before. Because I was deeply in love with him and he wasn’t at all. But he still see me as a good friend and now I do too. So I think it would be best for us to catch up once in a while. But I don’t know how often it should be. I’m thinking about once in 2months. And I hope I can visit his city again next year(once in a 1-2year). Because he’s the one that I wanna keep in my life forever as a good friend. I know he would never think of me as more than friend so well. And now i’m happy that we still can keep our connection beautifully as friend. He respect me so much and makes me comfortable and happy. It was hard to deal with my feelings for him, but if I keep proper distance, I believe we can keep our friendship for a long time. I hope you leave your thoughts of this if you read it all.