I agree with @Divorcedalongtime
This early on, it shouldn't be this hard. This should be the honeymoon period.
It still comes back to the same starting point (in my opinion), which is simply this: when they are genuinely interested, you know, and there's no wondering.
Again, and this is just my opinion, if a man can not be bothered to put the effort in, I don't view it as my responsibility to try to "fix" it. He has a choice, and right now he chooses not to make the effort... And it's so early on.
You don't have to expend energy in trying to fix something that you didn't break. As women, we do this way too much in relationships. Man behaves like crap, woman tries to fix. Rinse, repeat.
There are men out there who do put the effort in, and it really feels like you've not just got a good partner, but a partner who is on the same team as you, and wants to make the relationship work. These sorts of men are the ones worth talking to when things go wrong, as they inevitably will. A man who you've been dating for 6 weeks and puts very little effort in, nah.