Guy in dating wants to see me all the time. Is this a red flag?

The guy I'm dating, I have been friends with for 6 years. In those 6 years he has always shown a romantic interest in me. It's never been the right time, in the 6 years I've known him I had been in a serious relationship and had a baby. My serious relationship broke up 3 years ago and I just wasn't interested in pursuing anything seriously so on and off over the past 3 years we had just been very casual and meeting up when it suited me.

The past 3 months we have been more serious, I have been seeing him about 2 to 3 times a week and already he has started talking about the future. I have made it very clear to him that I am a busy mum and I really cherish my alone time, he said he understood. I would be willing to see this dude every second night (which is a lot for me as I love my alone time and need it to recharge).

The past month though he has been asking to see me like every night. He went down to the pub today to watch football with his friends which is great, I really believe it's healthy to spend time apart. He called me from the pub and asked if he could come over at 9 pm. I told him he couldn't as I was going for a bath and an early night and my daughter has nursery the next day. He sounded quite offended and I told him it wasn't personal but like I've said I need some time alone as I was just with him the night before and the full day today. He's now being off with me and hung up the phone.

Is is this a red flag? I have set out my boundaries very clearly so I don't know what else I can do. He has never had a serious relationship whereas I have had several so I know what mistakes not to make now ie spending too much time together, it's not healthy and I feel it's suffocating after being alone for 3 years.

Am I being selfish in not wanting to spend everyday and night with him?
Guy in dating wants to see me all the time. Is this a red flag?
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