Feel like I messed up- am I overthinking?

I've been going out with this guy for 4 months and it's been good. But in the last week I've just been really over-thinking things.

I told him I loved him for the first time last weekend and he didn't say it back. It wasn't awkward after but I guess he wasn't ready to say it back. Every day this week (Monday to tomorrow) he was either working and then had meetings or activities after work, genuinely every day. Normally we go for drinks on Wednesday, but he had a meeting after work til 10. So when I asked for drinks on Wednesday he obviously said he didn't have time.

I was out with work people on Thursday and got ridiculously drunk, rang him for a while (don't remember the conversation) and asked him to come and pick me up at 10pm, which he didn't, which I'm glad for since I was a mess. But I still felt stupid about it after and clingy.

Spoke to him on Friday at work and he was nice and not off with me at all, but that was it. He's away on training from 6 on Friday to Sunday evening, so I'm not expecting a text, and I haven't got one.

TLDR: BF is ridiculously busy every day this week for actual reasons, but I'm freaking out that I've acted badly and this is after I just told him I loved him. What do I do?

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Thanks for the advice, you're right, there isn't anything I can do other than not think about it at the time.

Another thing is that I feel like quite often I'm asking to see him, although this is usually Thursday night me asking and him saying that yeah I can stay over Friday night, which I do every week. He once told me he doesn't know why I'm still asking since he just assumes I'm coming round every Friday after work.

Which makes me wonder if that's not why he's not making an effort of asking me? I stay around Fridays normally then we do something or he invites me out Saturday, but it's more like spontaneous rather than him planning it before.