Am I wrong for getting annoyed about this?

So it's a bit hard to explain, but I'm basically in a pseudo-relationship with my ex boyfriend at the moment. We were long distance and very in love, but the distance tore us apart even though we didn't want to break up. Anyway, we've been talking all the time since October (we broke up last June and didn't talk until October) and we 100% still act like we're in a relationship. Anyway, he's pretty bad with his phone. We're both in high school, and he has a weekend part-time job and plays a varsity sport, so he's pretty busy. So to an extent I understand that he's bad with his phone, but I feel like it's worse lately. We normally facetime every night, but we haven't facetimed in 4 days, and it's been a pattern lately. He's been taking forever to respond to my texts on weekends, even though he constantly promises he'll FaceTime me or talk to me, and that's why I get annoyed. The last two nights he promised me he'd FaceTime me, and he hasn't done it. I understand that he's busy, but I'm pretty frustrated as I'm just as busy but always make time for him. Am I overreacting? This is the exact reason we broke up in June. The text I attached is from today when he took a full day to respond to my text (I had texted him last at 9pm the previous night), and when I took a while to reply, he does this. He was kidding about the killing himself part of course (bad joke I know) but I feel like it's not fair.