Clucky husband

My hubby loves kids has wanted them since way before we got married (7years) we have been ttc 2 plus years with latest findings being unexplained infertility with <a href="">IVF</a> being the next option.  We could self fund a couple of rounds at a push, but could be on public waiting list for years as it 'still could happen naturally'.  NZ based.  How do I help him he's has his 35th birthday coming up and is asking what is the point in life- he would not take his own life, but is lacking motivation to save, do stuff etc... I am optimistic but can't hold both us up any positive suggestions to help him/us push forward.