What to do when long term relationship is no longer the same, yet you still love each other?

if the relationship is not making you happy and making you feel amazing then i would suggest leaving him. Of course you still love him because youve been together so long and you've shared so many experiences with him but people grow apart and become different people. A lot happens over ten years. Stop worrying about what he will go through, worry about yourself and what you want. If you do leave him, your giving yourself the chance to fall in love again and have those great feelings with someone else.:) good luck