Sounds like you are morally opposed but not legally.
I would put it a little differently. I say that it is my moral obligation to avoid putting a woman in a position where she would want an abortion. It's not up to me to decide what is the woman's moral obligation.
Personally, I look at abortion as the worst possible solution to a easily avoidable problem.
I agree.
How could we possibly handle that many more people?
That's an argument for birth control. It should not be an argument for abortion.