My problem is i already have a girlfriend but my cousin told me that she loves me and we kissed is it ok to have a relationship with your own cousin here is the relation between me and my cousin she is my grandma's (from my mothers side) younger brother's daughter will abnormal children born to us if we had sex
You are fifteen so I wouldn't be thinking about having sex with your cousin let alone having babies with her just yet. Think this through, how old is your cousin, why did she say it, do you "love" her back just because she said she "loves" you or was it real even though you have a girlfriend that you technically cheated on with your cousin. It's legal to marry your second cousin and by what you've described it doesn't seem like this girl is your first cousin so I'd say its okay legally wise. However i'd say really think this over.
Well you already have a girlfriend so... And you could have abnormal children but I read in a magazine that two cousins got married and they only had a miscarriage because her placenta burst and that obviously wasn't the cousins thing that caused it. It's okay but you will have a few problems
First, I reject any physical relationship outside marriage.
Problem is only from medical perspective. The closer cousins you are, the more the chances. The more repetitively it happens in generations going down, the more the chance.
As for all those "ewww" and "that's not possible" and "dude that's your cousin for God's sake"... These are all creations of western/modern culture. There is nothing prohibiting against marrying your cousin. Don't go by the 1000 downvotes you will see on my comment.
This reads all kinds of wrong. Fuck me sideways, dude... ?
If you live in the U. S. it's legal in all 50 states to marry your first cousin. I was surprised to find that it's true when I read up on it some time ago. The thing that is wrong is: you have a girlfriend, and in addition society will most likely not understand.