I agree with LiteraryDevil, you're giving him all the power here. You're waiting for him to text you, waiting for him to make plans, trying to guess how interested he is. You need to start taking statements like this:
if he was more open I’d be happy to go on in this relationship but he just seems closed.
Which are all about him, and rephrasing them in your head as statements like like:
I'd like a relationship with someone emotionally open, and this man seems emotionally closed, therefore this relationship is not something I will be happy to go on with
Don't think:
*should I really expect constant contact?"
Think:
*At this stage in a relationship, in order to feel happy and connected, I expect constant contact, and it's not being given."
You're phrasing everything in terms of how you should best bend yourself in order to fit the relationship that's on offer. You need to start thinking about what YOU want and whether the relationship on offer fits YOUR needs. It doesn't matter if other people think your expectations for contact are too high, if that's the level of contact that you want then don't settle for less.
And for what it's worth I ALWAYS felt (and was accused of being) "needy" in relationships, always "over reacting" and "expecting too much" over things like this. I wasted months or years trying to dial it back and play it cool - basically trying to constantly guess their interest level and behave in a way that would best maintain it. And then after my last relationship I'd absolutely had enough. Like, sick to the back bloody teeth of trying to change myself to fit around someone else's crap. I made a big list of what I wanted from a relationship, the levels of contact and affection etc, and swore to not deviate from that list. And every date I went on I asked myself "is this person meeting MY expectations? Is this person behaving in a way that makes ME feel happy and confident?" And if the answer was no, off I went. No trying to change myself, no waiting for them to change, no compromise, no exceptions. And since I met my DP I have never once felt insecure or needy, because (shockingly) you don't behave in a needy way with someone who's actually meeting your needs! Seems blindingly obvious but it took me about 12 years to figure that one out.
I'm telling you, start making yourself and your needs the first priority in your life - it's a bloody revelation!