She could, but the Witness would not likely be a Witness for too much longer, given their practise of disinvolving anyone who doesn't fit their standards or maintains too much contact with the "evil" outside world.
EDIT:
The above answer is obviously from a non-Witness. It's not a matter of 'who doesn't fit their standards' or calling the 'outside world evil'. JWs do not judge others' hearts, whether a JW or not.
However, the purpose of dating is to eventually lead to marriage and it is advisable to marry only in the Lord as the scriptures indicate, as marrying of different faiths can lead to an instability within a marriage union. It's a way of life/lifestyle for JWs, not just a 'religion/name'.
he did not date Selena Gomez he dated Anna popawell
The youngest Selena Gomez will date is 14 years old.
u cant go on a date with Selena Gomez its impossiable
A Jehovah's Witness would know and if you have a computer check jw.org
yes Selena Gomez and Taylor Lautner have dated
Selena Gomez has a big crush on Shia LaBoeuf, so him
No date has been confirmed on when Selena Gomez will be coming to Lebanon.
No! Justin Bieber is Selena Gomez's Boyfriend
Selena Gomez and Liam Payne have never dated. :)
Yes.
You get famous
Yes. I did.