Trusting God?

So its been a while....let me catch you up on life. School is going well. Most of what we are learning is theory stuff and we don't see the application yet, which is frustrating at times. I do enjoy learning more about the different aspects of what I will actually be doing as an OT, but I am mostly enjoying my classmates. God has defiantly blessed this class with some amazing girls and I have become great friends with many of them. The are just wonderful girls! Outside of school things are good too. God is teaching me so much through relationships and the big thing I feel he is working is TRUSTING Him. It is so easy to say that I trust God especially when I am liking school, loving my classmates, and hanging out with an amazing godly man. And even when things aren't going so great I can say I trust God. When tests are difficult or other things are crazy I know God is control and can say I trust God. But just saying it doesn't always make it true. Just in the past day God has been pounding me with the questions "Do you REALLY trust me?", "Do you REALLY believe I have an amazing plan and want the best for you?" He brought about a situation a day or so ago that has really made me search my heart for the answers to these questions. All I'll say is that it was a relationship situation. Nothing terrible, bad or even hurtful. Just difficult. How can I be trusting God when my heart is screaming NO!? I desire with all that I am to fully trust the Lord and I defiantly want to in this situation because I believe He brought me to this relationship for a reason. I know He is sovereign in all things and all situations and most of me is okay with how things are, but the other part is so upset. I feel like I am letting Him down! I realize that the Lord uses situations like this to build and test my trust for even greater things to come. This is how He and I work together. This is how He teaches me best. I've been through it before, many times and God always has amazing outcomes. I'm just having a hard time focusing on that truth this time.