Is my relationship worth saving?

So lately my boyfriend had been very distant and he will go days without talking to me. On social media he leaves me on open and it is killing me. He says that it is because he is under stress and I get that because his mom is in the hospital but we havve been together for so long that I expected him to talk to me about his problems not push me away or even ignore me because of them. I guess all I want to know is if the relationship is worth saving. I really love him but this is putting so much stress on me and I've been crying every night. Is love enough or should I just let him go?