Why do boys lead girls along?

I have history with this guy and we message occasionally and have done for 4 years. I decided to take the plunge and ask him for a drink as I would regret it if I didn't. I decided to delete the message as I was embarrassed but he replied asking what did I say in my message. I laughed it off and said lets forget about it and we continued texting for a few days. He was more conversational than ever and last night we were both out in town and he asked if I fancied meeting up. He waited up for me and came to my house where we spoke for hours and had a laugh. We kissed a lot and both said it was nice to be back next to each other after so long. He kept teasing me about the date and how I deleted the message and was a coward, in a banter like way. He stayed in the morning and was acting very keen and like we were a couple. He said I was the best cuddler and kept complementing me. We had such a good time laughing and joking and flirting but since he left he has not messaged me. He has messaged in the past when he has left my house. I don't want to message again as I have messaged a few times first recently but am so confused by his behaviour as he seemed to indicate that we would see each other again and that he liked me. Any advice on this boys behaviour or is he just being a player
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I messaged him and said that because I haven't heard from him he probably doesn't want to but I would regret it if I didn't ask him properly to do something and no worries if he didn't just was nice to see him the other day. he replied saying 'hello, sorry I didn't mean anything by not messaging I've just had a busy few days. unfortunately I have plans for the last couple of days before you leave. could do something when we are both back home? if you wouldn't mind'.
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I replied a little while later saying no worries I was just a little confused after you left the other day. honestly don't want to make you feel pressured into doing something, only if you want to. back home is fine just let me know'
Why do boys lead girls along?
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