You are not a legal husband and wife relationship, but a cohabitation relationship. You can negotiate to terminate the cohabitation relationship, arrange for child rearing, and divide the common property formed during the period of living together. If the negotiation fails, you can bring a lawsuit to solve the problem of child rearing and property division. If you want to terminate the cohabitation relationship, you cannot and do not need to bring a lawsuit. The two parties can naturally separate.
