This is one of the most positive cards in the deck!
Ten of Mirrors signals contentment and joy. It alludes to marriage, enduring friendships or even the start of an exciting new adventure. The main advice here is to simply enjoy it and let things be. Very little effort is required on your part now and trying to control everything (especially a romantic situation) could send it afoul.
This card is encouraging you that you have achieved emotional fulfilment in the present cycle of your life, and you are now ready for an emerging new one.
Keep on keeping on!