We have been together for a few months now, and generally get along great. Our "arguments" are short and never serious, we discuss problems pretty well, and have been getting to understand each better as time goes by. 

However, when it comes to me expressing some of the challenging thoughts and emotions I feel as a result of anxiety and depression, he sometimes seems to shun/push me away. I feel like he doesn't take me very seriously when it comes to the more difficult feelings/thoughts that creep up on me. 

He said he wants to understand me better and for me to be 100% honest, but it seems like every time I try to be honest about difficult subjects/feelings, he doesn't want to hear them or is annoyed, maybe angered by them. 

Once I even overheard him ranting to his mom about how I talk about suicide sometimes and say I'm all depressed or anxious, he was saying it all like I am faking it or he is straight annoyed by it all. I understand that listening/watching someone struggle with these issues isn't easy so he might need to vent too, but it hurt me that night.

He made a comment tonight before work saying he can't handle all my emotions and shit right now, even tho i feel like I wasn't throwing much at him. I was expressing how I'm very stressed about a situation we got ourselves into and certain conditions surrounding the tough situation that make it all the worse. I thought maybe he might want to vent his stress about it too, but I guess today wasn't the right time.

Sorry if I'm not being very clear, there's  a lot of backstory and ita difficult for me to describe it.

Tl;dr: my SO seems to get annoyed/not take me very seriously when it comes to my struggles with depression and anxiety even tho he said he wants to be there for me.  I'm not sure how to better discuss or express myself with him in these regards.