Yes.
yes
The man who made you pregnant.
This can only be determined by a DNA test to find out who is the father of your baby. Unless you are willing to do this (and your boyfriend or any lovers you have are willing to be tested) then don't blame your boyfriend.
No, if possible your boyfriend (as the father) needs to be involved in bringing up the baby.
It isn't the birth father, no one will ever change the childs birth father, but he will legally be the step father,until the divorce comes through.
Possibly. Unless they were legally separated or the boyfriend's paternity has been established, the husband is presumed to be the father of the child in question.
No. She does not have to by law. It is up to the woman to discuss with people she trusts and make the decision for herself.
No. You must have parental permission first.
Usually this is taken before a judge and in some cases the judge would rather see the parents of the baby married. It depends on a lot of things. No, you can't get married at 15 even if your boyfriend's mother agreed to it. Marcy
She will have to take court permission first.
As far as I know, the legal obligations are the same as if you were married to the mother for 20 years before she got pregnant. If you are the father, then you are the father and that means you are legally and financially responsible for that child.
No. The fact that you are pregnant does not impart any special freedom. You are a minor and your parents are still legally responsible for you and your actions.