Is this the end?

I have been in my current relationship for a year and a half, we are constantly talking about forever which I love, I am one to date someone I can see myself marrying. However, I’m realizing that this relationship is kind of an escape for me. I haven’t been very open with my s/o because it’s very difficult for me but I recently tried to be and got completely shot down. He said he didn’t want to hear what I had to say because it made him sad, although he immediately apologized but his words hit me like a truck. I am now having doubts about whether or not we have a future or if our relationship can grow. He’s really the light of my life, I am so overwhelmed in every other aspect of my life and it seems that the only time I’m happy is with him. I’m not ready to lose him... but it might be for the best?