Debating on therapy

Long story short, I’ve had it on my mind heavy lately to get my 10yr old (and myself) into therapy. We’ve been through some things nobody else in the family will ever understand. Even though he was younger, he still remembers a lot and I think it’s all surfacing in another way. He just doesn’t seem himself..He’s extremely quiet lately. When I try to have just a regular conversation with him, he will just stare at me like he doesn’t know what to say in response. Theres just several things I’m picking up on and it’s kind of worrying me a bit. I want my children to be happy in life and never feel like they can’t talk to me, even a simple conversation ya know…should i seek therapy or are there other options?