<human>: Can you succinctly summarize the text in 1-3 sentences?

We have had a lot of relationship problems recently,which almost resulted in us breaking up for good.We decided to try and make it work
because we love each other and apparently both want to be with each other. 

It's been going well but only one thing bothering me is something that my boyfriend has being doing for a long time now and hasn't changed despite me talking about it with him.

Say we spend a night together, and then the whole next day, we have an amazing time and get on really well, we're always both in really good moods when we are together like that and always have fun. The last time we were together like that was last weekend, we went out on the saturday night, I went back to his and stayed, then we spent the whole next day together, had fun and I went home around 9:00pm

It was really nice and we both seemed to be on high from being with each other. But then the last few days, we've been emailing like we usually do to keep in contact and I've noticed he isn't as talkative, is sort of dry, not replying back for hours,replying back with one word answers, changing the subject when i'm talking about something in particular, just generally giving me the impression he couldn't be bothered for me.

Where as before we spend that amount of time together and we haven't seen each other in a couple of days, he will email me constantly, tell me how much he loves me, is really upbeat and chatty.

He does this every single time we spend a day or two together. It's really annoying and is just making me feel like he's using me or something. I've already told him before that I've noticed this and he didn't really make any comment. 

Is this a man thing or what's going on?
<bot>: whenever i spend time with boyfriend it's good and we both enjoy it and have a lot of fun, but days after it he'll act distant,dry and uninterested in talking to me