Will a baby make a marriage happy?

Having a baby to prevent someone from leaving is risky. 

First i would find if not having a child is truly whats causing the boredom. Also, it depends if it is a healthy marriage. Children don't belong in broken marriages where there is hurt or abuse between spouses, whether mental, emotional, verbal, or physical abuse. If both partners are happy together and feel strong enough to raise a child together, then I dont see why they shouldn't have kids. 

that is extremely risky 

If the marriage is already in trouble, having a child will only increase the issues, not heal them. AND, its unfair to the child.

No, but it will compound and hurt a child down the road. As for a "friend" down the road, in my opinion only, my child will never be "friends" with me.  I'm his mom, not his buddy.  He's now 30, it doesn't change.  But that's just me.

More like the opposite.

Even in a strong and stable marriage, a child adds enormous stress. It's more likely to drive a couple apart than together.

No it will not, it will just add to the problems, best to divorce.

No, Florry.  Look how badly it worked for your parents.  They raised a VERY "screwed up" child: Remember what you've posted?

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“Scared what my parents will do next....please help? I'm 16. Iv a sister aswell. We ... too young to leave home.” /question/index?qid=20210...

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“When can wife get back in sack after having kid...her 5th? Hi just wondering my missus is about to have our 5th kid in 4 weeks. Obviously theres not much happening in the bedroom. This is difficult for me for mans reasons. If she has section does that still mean 6 weeks plus out of action? I must admit I'm getting close to a woman who comforted me the last 4 times but I dont want to go there this time as this woman doesn't know my situation and it got tricky last time” /question/index?qid=20210...