I’ve been in a relationship with my boyfriend for about 2 years. We’re both in tech and in our mid-20s. Everything is great, except I want kids in the future and he doesn’t want kids at all.
Also...this is going to sound harsh, but the pickings of single people without baggage start to thin out in your late-20s (people tend to couple up if they want to start families or be in lifelong committed relationships) and it gets harder for women to date as they get older because high-achieving men tend to be willing to date younger women, but high-achieving women tend to want to date their peers. So if you are pretty sure he's not going to change his mind and you won't change yours, I think the wisest thing to do is to let you two go off and separately live the lives you want. Therapy can help you gain conviction on how likely either of you is to change your mind.
Also, you might want to buy yourself some time and freeze your eggs or just talk to your obgyn about it. I rarely hear a lady say she regretted freezing them.