Really upset and need your opinions...PLEASE HELP

I really really help on this because I am totally confused and don’t really have anyone I can really talk to...I’ve been with my boyfriend for a year now and from quite early on we both agreed that this was different and that we were definitely going to end up married with kids the lot.
We have agreed not to rush things though and will be starting to save up soon for our mortgage deposit (this will take about 18 months though so again no rush). We don’t see each other every night but about 5 out of 7 and we speak on the nights we don’t see each other although we don’t text constantly as we both work and my boyfriend isn’t in to texting all the time....with anyone not just me.We get on really well, have a laugh and like doing the same things. I get on very well with his family who love me too. He has never had a serious relationship before and is 3 year younger than me at 24. Now he has always been used to doing what he likes and is very spoiled. Since we’ve been together he has let me down last minute for nights in several times to go out drinking with friends but he always make its up to me and i give in although I don’t like him treating me like that I hope he’ll grow out of it.
However, this weekend he has done it again but this time he didn’t even call me, we where meant to meet at my house at 10pm after work and he never showed, didn’t answer his phone or texts so I just left it. He called me at 5am and I said I didn’t want to speak to him as I’m sick of it and I hung up and put my phone on silent. When I woke up I’d had 20 missed calls. I tried to call him but his battery had gone. Now I know from his mum that he had stayed at a friends that night and he came home the next day got changed and went straight back out until midnight last night and he has now gone to work...without charging his phone again!
I only ignored him as I want him to realise I won’t put up with that and hope he’ll learn a lesson and change but I’m so worried now that he won’t and he’ll just want to split up because I’ve bruised his ego by putting my foot down for once. I don’t expect him to be perfect but at least a phone call should have been made early on and he needs to realise this. To be honest I have been too soft on him during our whole relationship and he very much so wears the pant but I’m not perfect myself and am not a walkover, but I love him to death and for the first time really thought he was ‘the one’.
Will he realise he wants me or will he leave me heartbroken?

Please help 

When he has done this in the past, did you tell him that you considered his behaviour unacceptable and explained the reasons why you feel like that and what needs to be done so that this can be avoided in the future?If yes, then he is clearly disrespecting you and you did well by not giving in to his 5 am(!!) phonecall. If not, then it was your mistake because he is not a mind-reader and cannot tell why his behaviour has upset you so much this time.

Cancelling on you at the very last minute and not even having the courtesy to inform you that he doesn't plan to show is really poor form on his part.

You two need to sit down and have a discussion about this. If something is bothering you in the relationship then you should voice your concerns and make it clear that you are not willing to put up with it.If he cares enough, he will understand and you two can then discuss how similar situations can be avoided in the future.

Thanks Andariel, yes I have told him in the past and when I have really put my point across (for example he did it to me on my birthday weekend!) he changes for like 2 months but then goes through a spell of doing it again. He knows it upsets me and makes me unhappy but I think because I have give in every other time, even though I have had a go at him, he just thinks I'll forgive him eventually. I really love him so much and I am heartbroken right now in case he dsnt change...i swear if we split up an he was with another girl it'd kill me :(