Ex called me after three months? Didn't answer because phone was on silent?

Anonymous
So so confused. I haven't been talked to my ex of 8 months, my first boyfriend, for the past three months. I'm 19, he's 24. These past four months have been very hard/emotional since this was my first breakup. Reason of the breakup: he became sexually pressuring. (I'm a virgin, he's not). Almost lost my v-card. Got mad at me when I didn't give him oral. Became disrespecting, dishonest, and apathetic as I do have anxiety. Couldn't handle it anymore.
A month after the breakup: saw him at a concert with a new girl. Saw them flirt. He saw me and acted like he didn't know me. New girl even smiled at me. (Hurt so so so bad).
He then two weeks later sent me a text, and was like, "hey how are you?" at 1 in the morning. When I didn't respond, he asked me if he should delete my number. Didn't respond. Was too emotionally hurt.
Didn't hear anything from September.
Now since the breakup, I have been gradually working on myself. Although I do have depressive episodes, I have improved my makeup and fashion, and I am also seeing a therapist for my anxiety and dysfunctional home.
So as I was doing my hw, I checked my phone and saw a missed call from him. My phone was on silent. I was like OMG. I won't lie, I think about him everyday. He was my best friend since November. I opened up to him in many aspects. Now I feel like he has something important to say. I didn't want to call back as that would have appeared needy. I'm just shocked because I thought he deleted my number all this. He didn't leave a message. As I am trying to move on, I am now ready to hear what he has to say as I am not emotionally hurt like before. I'm just afraid he won't call anymore..
Updates:
+1 y
And it's funny cause my mom and I talked about him earlier today. She hates him now.
+1 y
I don't even know if I should tell mom this.
Ex called me after three months? Didn't answer because phone was on silent?
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