how long should I wait for a message or should I message him first?

[Pixie]

I work at a sales assistant in a shop in a hospital and one of the cleaners in the hospital comes I'm every time I'm working and tries to flirt with me.

after about 2 months he's asked for my twitter and we are now following each other on twitter as of lunch time today.

how comes he hasn't messaged me yet? I want to speak to him to get to know him because I know nothing about him but I feel like he should message me first?

what should I do, I'm next in work on Sunday and I know I will see him then and I feel like it'll be awkward when I see him on Sunday if we haven't spoken on twitter in between now and them because that's obviously why he wanted my twitter?

[aha!]

This is going to be one of those questions, where we're going to debate all night because we have different points of view.

Breaking it down:
1) how comes he hasn't messaged me yet?
He could be busy. He may have cold feet. He may not know what to say. Don't blow things out of proportion, if you are.

2) I want to speak to him to get to know him because I know nothing about him but I feel like he should message me first?
Firstly, this is not a question; question marks at the end of this statement would make the whole thing confusing.
Secondly, why should he have to message you first? He could also know nothing about you, so why don't you message him with an open question? Sometimes, in my opinion, if you let misguided advice lead the way you develop your relationship, as oppose your own thoughts, it could cost you the other person in the relationship. Of course, if your biology mandates guys always making the first move to everything (and I have yet to come across a species on this planet that genuinely do things this way), then I have nothing to say.

what should I do, I'm next in work on Sunday and I know I will see him then and I feel like it'll be awkward when I see him on Sunday if we haven't spoken on twitter in between now and them because that's obviously why he wanted my twitter?
There's so many things wrong with the grammar here, I won't even bother try to explain. Don't do this in your next question.
Try to act normal, it's not something to be awkward about just yet. Have something to talk about in person, and you can catch up using Twitter. Using Twitter to start conversations isn't always ideal anyway.
Of course, if you can't talk in person, I can't imagine how you are going to do this over Twitter.

On the flip side, he could just be a flirt. It's not determined, and I wouldn't put too much thought into it, but it's there if you need to address it.

I feel like I'm preaching my values onto you (and if I apologise if I am), but I think the following needs to be said:
I think part of the problem lies with the guy, in that he's having problems starting easy conversations with you.
However, part of the problem lies with you. If you are making the situation more awkward than it needs to be, then you're just making life needlessly harder on yourself. If it gets too awkward, then I think your chances of having a relationship with him will diminish drastically.
Personally, if I met a girl who puts the value of her 'process' and her 'values' above having a relationship with me, I immediately lose interest. Hence, why sometimes being yourself works better than following a process. If the process is naturally aligned with you as a person, then authenticity does not become a problem, and things get awkward because you're awkward together for the 'right' reasons.
As far as I know, guys making the first move in a relationship does not seem to make the relationship anymore successful than if the girl makes the first move. Neither does it seem to have any biological, psychological, religious, legal, historic, nor cultural necessity to it. i.e. people seem to do it because either they want to, or other people do it.
For me, I want to date the person, not the process the girl is trying to impose on me. I want to know the person, not the process. I want to spend time with the person, not the process. The process turns off most guys anyway (and can be really offensive to some).

Just message him, irrespective of who does it first. Ideally one of you should, otherwise I don't think the relationship will get anywhere.
If neither of you message one or the other before you next meet, just pretend to be ok with it.

Hope this helps