Should I just leave...

Hello. I'm a 23 year old student doctor. My bf is an accountant who is 35 years old.

We started our relationship in December 2018 and it's been great some days and awful some days. The main issue is that his job requires too much attention and I'm often pushed aside because of it. Many dates cancelled.

He feels smothered with the amount of attention I ask for. And I feel like i don't get enough attention from him.

Right now our current issue is that he's overseas on a business trip and I miss him like crazy. So I'm often what's apping him whenever I see him online. He would talk to me for a few minutes then say he has to go. So I always let him. But then he's still online. Why get rid of me if you're online. Why not just talk to me.

Am I not a priority? And I can't talk to him about the issues I have with the relationship because he always says "if I'm not making you happy then we should break up, I don't want to make you sad. I love you but if I'm hurting you and I'm not enough for you then it doesnt make sense being together" and it makes me bottle up my feelings and not Express them to him.

It's not always bad. When I'm actually physically with him , I'm the happiest girl on earth. Smiling throughout ththe entire time spent together. But when we're not together I overthink everything. Like why is he online? Why didn't he message me for like last 4 hours? Why did he cancel plans with me? Why cant you cancel your plans for me?

Am I being selfish? Or should I just leave