It looks, sadly, as if your relationship is going downhill, losing passion and the intensity necessary to maintain a good, normal, functional sexual relationship. I think that you need to have a very serious talk with Martha [pseudonym] about the dissolution of the relationship. You do not want to stay trapped in an unproductive,
unsatisfying relationship until you are too old to explore other options. Both of you need to decide together whether this relationship is worth preserving and repairing, or whether you both want to go your own ways.
One thing is certain: You cannot "keep a relationship going" by yourself; it must be a cooperative and shared effort. If she is unwilling to share the work of maintenance of the relationship (hugging, touching, sex), or if she simply does not want to do so, you must move on in the construction of a life that you find personally satisfying. You owe that not only to yourself, but to your child.
For the baby cannot possibly thrive in an emotionless or cold environment; that would be to do violence to her mind, or to her Soul, and she deserves better than that. If you wish to discuss the situation any further, you can call me, at (513-)737-LOVE (5683).