Lynn's ideas about finding another mom or group where you can be with others and share duties sometimes are good ones.

Maybe you can think a little more short-term, too; it should get a bit better when your son starts pre-school/kindergarten and you don't feel like you have to be with him every moment for him to get the benefit of being your son. Being able to work or go out while he's at school for a few hours was really freeing for my daughter-in-law with her two children (who are now 7 and 8). I know my other sons are single and arrange their schedules to babysit some too (one gives an entire day, loves being with the kids).

That you feel like this now does not mean you will always feel this way. It is good you are realizing these things and talking to your therapist some about them though.