I would say Go to Relate if both sides actively want to make the relationship work. If he is reluctant or is abusive, then it definitely won't be 'worth it' if you're looking to go off in the sunset together.
However it could be worth it to some extent, even if you eventually split up.
I went to Relate with my EA H. I did not feel any more safe and secure in those sessions than I did at home, i.e. I felt just as distressed and terrified on a sofa in front of the counsellor as I did when he got angry at home. The counsellor did not stop the sessions - as he should have done in the case of an abusive relationship - and merely sought to draw my H into the session. H would sulk on the way home and refuse to discuss it between sessions. It was yet another weapon to use against me.
It was only when I went to see the counsellor on my own after I couldn't bear to go with arsehole XH, that he told me that I was in an abusive relationship.
So, Relate was 'worth it' in the sense that someone - eventually - validated that my H was abusive. And the agonising sessions brutally reinforced just how much of an arsehole XH really was. When I begged him to go to Relate I was still thinking that there must be something I could be doing to make things better! Imagine that!
I can see my case was extreme. I hope you manage to rebuild.
It really all depends on whether both of you feel you can work to repair your relationship. If one of you doesn't, then there would be no point in going.