I'm sorry you are having a rough time, Annette. I agree with Benjamin that it sounds as if you are unhappy about other things in your life, and that just makes being motivated to do the work we have to do to manage our D even harder to come by.
In the just short of 5 years since my diagnosis, I've found that I need to add more enrichment to my life than I did before D! Because if there aren't things in my life that I care about and that nurture me, then my whole life becomes Diabetes and that isn't much of a life!
You say you are completing your Masters and hopefully you are doing it in something you are passionate about and look forward to working in. But graduate school is hard - it is work, so you still need something positive to cause you to feel fulfilled. Not having any family or friends where you live is hard. Do you communicate with them often, by phone or on Skype? Obviously you can't move your family but have you made an attempt to make new friends in Florida? It's not an easy thing to do for some of us and you really have to put yourself out there, but otherwise you will be lonely and resentful of your Diabetes! As Benjamin says, whatever activities you enjoy or have enjoyed in the past you have to do now, or, as you're young, try new ones! The best way to connect to others is through shared activities.
Have you contacted the JDRF in your area? You can look them up online and find your local chapter. I started a support group where I used to live under the sponsorship of JDRF and I can't tell you how important it was to me to connect to other Type 1's!
Finally, do you think you might be clinically Depressed? If so, it isn't going to go away. People can tell you to "cheer up" but for someone with clinical Depression that just makes you feel worse because you can't just pull yourself out of it, if you could you would! So if that might be the case I strongly encourage you to go to therapy. Just because you've done it in the past doesn't mean it won't work now. You have to find the right therapist for you (think about what you did or didn't like about the counselors you've seen). And at different stages in our life we both have different issues to work on, and are more ready to do the work we need to do.
Feeling hopeless is a part of Depression. If you are assessed and diagnosed with Major Depressive Disorder, you might need medication. Some people are very anti-medication and think you "should be able to deal with it yourself". But Depression is chemical and sometimes needs a chemical treatment.
You deserve a good life, and you are worth the care it takes to get you there.