tiff21390 - I just would like some advice and encouragement on how to deal.
Welcome tiff21390 , I'm sorry that you are feeling hurt by your ex-boyfriend's decision to break-up. It would be best for you to move on with your life by doing fun activities with close friends and making new friends. If you are unemployed and don't love where you currently live, maybe moving back home for a short-time would help you emotionally and financially.
DITTO what breakfast of champions wrote about reading Steve Hassan's books (i.e., "Combatting Cult Mind Control", "Releasing the Bonds: Empowering People to Think for Themselves", and (his latest book) "Freedom of Mind: Helping Loved Ones Leave Controlling People, Cults and Beliefs").
Avoid relationships with JWs and other members of dangerous cults. I felt like you about 5 years ago when my "Spiritually Strong" (non-thinking) JW (and former) friend and I fell in love with each other. It was very painful, but I dodged a bullet by her not wanting to continue our relationship with each other because of the unequal yoke argument. My former friend has two personas. An authentic persona that I fell in love with and her cult persona that caused her to feel guilty being with me. Reading Steve Hassan's books will help you to better understand what I am writing about.
Your friend's cult persona broke up with you because of his recent attendance at a WTBTS convention. The more JWs attend WTBTS events the stronger their cult persona becomes for a couple of weeks. In a couple of weeks your friend may try to contact you as his authentic persona misses you and his cult persona grows weaker. If your friend does contact you, your life will have less unnecessary drama if you ignor his calls and move on with your life. Your JW friend has too much unnecessary emotional baggage that he would need to resolve before you could ever trust him to love you more than the WTBTS.
Best of wishes for you.
Peace be with you and everyone, who you love,
Robert