Is this guy a player or is it me?

[Reese123]

I dated someone for a month - they were 10 years younger than me. I made it clear from the start that I wanted a serious relationship- we slept together, he buggered off immediately.

We did not speak after, but I assumed that it didn't work out because he didn't want the commitment which is understandable because of the age difference.

Now he's been dating someone for about three months who is about 6 years older than him - she inevitably will want commitment like I did.

Do you think it was me as opposed to the commitment issue that he didn't want. Please give me your thoughts on this.

Absolutely!! You will drive yourself crackers overthinking it. Been there. Never mind. Better luck next time and without being condescending I hope, just let it flow next time and hopefully it will be a good match that just unfolds naturally

No one owes you a committed relationship. Everyone has the right to dump a partner for any reason whatsoever - after only a month, the reasons might be trivial but it doesn't matter. He didn't want to be with you any more. Someone else may well want to be with you. And insisting you want a serious relationship when you have barely got to know the other person is a bad idea. You might just as easily have realised that you didn't actually feel that strongly for him.
But you do sound as though you might have come across as desperate, and that's incredibly off-putting.

Solid gold brass I think I get your message loud and clear - you couldn't be more clear.

I made it clear from the start that I wanted a serious relationship

I agree with Quint, this would make most men run a mile!