He might be very into her, but also value and need time to himself.
There's no way I'd want to see someone the day after a weekend a way or the night I got back. Tuesday sounds reasonable to me. I'd want time to 'recover'.
Some people don't need as much 'contact' as others for their social/emotional needs to be met.
If he wanted to he would, it’s that simple really isn’t it
Well, yes, it is. But the fact he doesn't want to isn't necessarily a reflection on how he feels about you.
I'm in a LDR. The last time I tried dating someone who lived closer to me, I was completely overwhelmed by how much time they wanted to spend with me (3 - 4 times a week). It was utterly exhausting and caused huge problems because the more he pressed to see me, the more I resisted and felt that I needed time to myself. I really liked him but it was just too much and I realised that there were things I could have been doing on that extra night or two but that weren't getting done - friends I hadn't seen; music I hadn't learnt to play; books I wasn't reading; life admin I hadn't got done...
I very much enjoy and value the time I spend with someone else but there has to be balance with the rest of your life. Now, I spend the whole weekend with the man I'm seeing every 3 weeks or so. It's perfect for both of us.
So it's not necessarily that this man isn't into you but he certainly isn't meeting your relationship needs any more than you seeing each other more often would meet his.