Please try not to panic.

We all make mistakes, whether we've had a drink or not. Your feelings have reinforced you're doing the right thing distancing yourself from him.

As for your LI profile. many of us are "creative" about our career achievements. May be better to omit the lack of support from manager. To me, it's something to be discussed in confines of interview. Yes, a blank space for that role would generate suspicion with prospective employers. Unfortunately, employers these days attach a lot of importance to your social media presence/content. Yes, LI is classed as social media!

My experience of LI was to close my account. Got fed up of people from last employer viewing my CV. Being nosy, to find out what I was doing as none of them bothered to message me.

Don't worry about going off-topic, it's all linked to your personal experiences. As for the guy who only wants an hour's work from you, is there any way you can negotiate longer with him. Put it on a formal basis, get paid. Who knows, you could become self-employed....