Search Results: how long to wait before calling

So, apparently the younger generation rarely calls for anything anymore. Texting is how almost everything is communicated.

This got me thinking, texts are much easier to miss than calls are (due to the lack of multiple ringtones/notifications). If you invite someone via text to do something that day for example, how long would you wait before calling the person if you did not receive a response?

Let's assume this is a significant other, close friend, or family member that you see quite often and you know they text frequently.

last time we hung out we told me he'd be busy during the week/ weekend (I don't totally remember what he said) so I just told him to call me. it's been 8 days and I haven't heard from him (I haven't tried to get in touch with him either). I've known him to wait like a week before, but this is frustrating since we just started seeing each other after stopping for quite a while (I was away). he has acted very interested, been incredibly nice and attentive, we clearly have a connection because he was the one to make the effort to come back into my life. I used to be the one to do the initiating, and I don't want to be in that position anymore, but I'm getting sick of waiting for him. we've hung out three times. I know he told me he was going to be busy, I just feel like this is a long time but aka could be paranoid. we have a really great time together and it's not just about sex

we've just started seeing each other after months and months of not talking because before we both wanted different things. every time we've spent time together (3 times) so far have been great. very romantic, fun, great conversation, always making each other laugh, etc. the second time we hung out I decided it was ok for us to have sex, as the two of us having sex together is nothing new. the 3rd time I stayed over at his place after he bought me dinner. in the morning I guess I decided to just ask him when his plans were for the weekend before I left and he said he was really busy, so I just told him to call me and said my good byes and he gave me a big hug and kiss. he has told me he likes me and had been really happy that I've agreed to hang out again. however, it's been a week and I haven't heard from him. this isn't exactly out of the normal for him, we've had conversations before where I remember asking well I would really worry if you waited like two weeks to call and and he said no I'd never do that. but I still feel anxious, just because we just started seeing each other again (he's the one who initiated it too). I'm just wondering how into this it sounds like he is relationship wise? he doesn't have much real relationship experience since his only one was long term and long distance, but I don't want to sound needy by calling him up letting him know I need more time. I was to appear independent, with my own life, not needing him but wanting him in it none the less. how should I go about this? the last time we hung out he was very very happy to hear from me, but I don't want to be the one initiating it again. what should I do, why is he acting like this?