is it me or him?
I am 25 and seeing a man of 49. We had sex for the first time and he didn't ejaculate. We did it a few times and he would get an erection but not ejaculation. Is it me? Am I not good enough in bed or does he have a problem? Erectile dysfunction or something?
You haven't given much information, but my guess is it is him rather than you. It is not erectile dysfunction, as you say he does get an erection. There could be a variety of causes for his failure to ejaculate, most likely psychological/emotional rather than physical ailment, but there could be a physical cause as well. A visit to his Doctor would be a good idea.