I think you first need to be aware that the Jehovah’s Witnesses are a non-Christian cult. They use a poorly-translated Bible, have made numerous false prophecies, follow non-Biblical and non-Traditional beliefs, etc.
The JWs have very exclusive beliefs. They believe that only 144,000 will go to heaven, and that sometime soon there will be Armageddon where non-JWs (“worldly people”) will be wiped from the face of the Earth. After that, all JWs (except the 144,000 that go to heaven) will live on Earth in “they new system”. Everyone else will be destroyed. If they realize you won’t leave your faith, there is a good chance they will eventually not want to be your friend. You will be dead to them because you won’t be in The New System anyway. They also shun ex-JWs, which means that former JWs lose their family and their friends. I have seen support groups for ex-JWs on the internet.
I know this because someone close to me used to be JW for his whole life, and only recently left. His mother converted as a child after her sister was killed by a car while crossing the street on Halloween night. And when he told her JW was a cult she tried to kill herself. The family are now Protestant Christians in the counter-cult movement.
I think you need to learn to counter their objections. There are lots of great resources on the “Catholic.com” tab of this site. Just use the search box and type in “Jehovah’s Witnesses”. You need to be careful to fall into the false teachings of Jehovah’s Witnesses.
You also need to prepare yourself for the very real possibility of being shunned by them. There are some nice JWs out there who are friends with people of other faiths, but a good many of them are very cult-like and don’t want to be friends with non-JWs unless they think they can convert them over (in that case they’d be JW anyway).