mhill0823 took the words right out of my mouth.
I had the same experience, lost a bunch of weight, got to comfortable, gained it all back plus more.
I know for me I have to remind myself that this is my lifestyle now. I now understand there isn't a magical number I can hit on the scale where I can let myself relax and indulge a little bit. For me personally I have to stay vigilant because one or two days of eating excess calories or skipping exercise can easily snowball. I can be on plan for 3 weeks, but sometimes one bad day can mentally derail me.
Congratulations on getting to this point! You should feel good about yourself!! Maybe you just need a new point of view. Show your new body how much you appreciate it by eating healthy foods and being active.
Something that really works for me is giving myself fitness goals. I started signing up for 5Ks and doing things out of my comfort zone like going white water rafting. I find that pushing myself to meet new goals gives me a high and a confidence that I don't want to ruin with junk food. I want my body to run at it's most efficient so I can do absolutely everything I want to do.
You also might just be tired of weight-loss. It's okay to take a break and go into maintenance. You said your happy with your body. There's nothing wrong with staying where you are now if you're happy. I know some will disagree with me, but I think it's less about the number on the scale and more about how you feel.
You've taken the biggest step so far by realizing what you are doing and coming on to 3FC for support. You've got this! Stay strong and you'll get through this!