AIBU with my upset towards my partner

[likeadog]

We don't live together but he is signed off work and cannot drive for medical reasons.
He's been staying at mine approx50% of the time. I'm a single parent with three kids.
He is generous in that he'll bring me for
Lunch or dinner at times but I've been providing all the fuel and most of the food.
He buys little treats for his siblings kids all of the time when he is away to bring back.

My issue is this.
He asked to bring me for lunch today after I dropped and collected him from an appointment an hour away.

Not only did he not bring me for
Lunch, I ended up buying us the lunch at a shitty service station and we ate in the car as he didn't want to sit in.
He then went and bought his nieces and nephews treats for when he gets home.
I got so cross.
Never anything for my kids despite living in our home half the time and not even a sandwich for lunch!
I pay majority of petrol and food costs.
AIBU.

Why?

Don't feel guilty OP, you don't owe anyone a relationship and can end things whenever you want and for whatever reason you want.

You have put your kids first, that's the main thing. Op never get into such a situation again. A man becoming your dependent when you are a single parent with 3 kids will never be a good choice.

It would probably have been OK but for the illness but now he's casting you as his GF and his Mum. I'm sorry he's ill but that doesn't mean he gets to sponge off you and he probably expects you to look after him domestically, sexually and pay his share for him. You didn't sign up for that, there's no "in sickness and in health" with a man you haven't married or been with for years.
Sadly I think your relationship has had it's day Op, don't feel guilty, you didn't offer, he's just assumed

You're absolutely correct. I didn't offer but feel like a mug now.
He took advantage of my good nature also. I hate talking about money and feel uncomfortable with taking payment for shared things and he knew that.
I feel relief this morning for some reason. Sad and hurt but relief definitely.

You have made the right decision, you are a good mum. Lesson learnt, onwards and upwards.

Thanks@Mally100.
I'm here thinking back over the last few months and the fool I have been.
Due to his illness, I've worked out that I've spent £1k approx caring for him and facilitating him.He was vocal in his appreciation but gave me £250 in total.
After I exploded yesterday, he tried to give me substantial money. I was repulsed because it dawned on me that he knew exactly what he was doing all along.
His illness is serious and life limiting but I'm the only person who has waited on him hand and foot since his illness began.
His family, with whom he maintains he has an amazing relationship with, have been useless and unhelpful.
Whoever up post said that he wanted a relationship solely with me, a house to use and a carer is bang on the money..
He actually gave me £10 one evening to get a chippy dinner for himself,despite my kids and I getting the same.
He has been my first relationship since my exh left some years ago.
My self esteem was clearly in my boots.

Sometimes people like these just creep up on you and you don't notice it, you just start having this feeling about things not being right. He knew exactly what he was doing. A decent man wouldn't do this, especially to a woman who has 3 children. He was there for his own intentions. Well at least you will be wiser and have firmer boundaries before you enter the next relationship. Don't be too hard on yourself, take some time out from dating and work on your self esteem. Best of luck.

Thanks to all posters.
When I'm feeling lonely and sad about him being gone I reread all of your posts.
He has, as usual one to ground without so much as an apology or even shame or
Embarrassment.
He cost me a lot of money but luckily it isn't n issue financially.
A good lesson for me.
Thanks.

Why aren't his siblings helping him?

His friends and siblings are 'too busy'.