Should I believe him?

My crush responded to my text late like couple days later apologizing that he didn’t saw my message ( he didn’t got push notification that I had messaged him) and he said that he uses whatsapp rarely.. is he genuine?

I removed him from my Instagram a month ago because we had a fall out but I didn’t remove him from my whatsapp. I thought that I will add him back if he brings up Instagram and that he wants to chat with me there.

by the way would that make him mad that I haven’t added him back on my instagram?
Should I believe him?
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