Is Everything OK?

So I have been dating my boyfriend for around three months. We were friends for two months prior and hence really vibes and decided to try a relationship.

The moment we were official he seemed to pull away and not talk to me as much. Usually I understand that you can get busy and I don't expect someone to text me 24/7. But he texts me for like five texts and then doesn't talk to me for days.

I brought up what it made me feel and he apologized. But things didn't change. I talked to my therapist who told me to just say exactly what it makes me feel.

I called him and I chickened out and told him I'll text which I did. He said he understands and that he would call me once his phone is charged. It's the next day and nothing.

What should I do?

Yes I like him. He was so cool and chill and vibing. Like my type and now I feel like I'm an after thought and a bother...