No one else can definitively tell you about yourself, they can only give their opinion; only you can figure out and "know" about yourself and that has to happen in your own time/way. Some of your feeling overwhelmed sounds, to me, as if your T gave you a lot of stuff, not necessarily about "you" but for you to think about and see what you want to do with.

That's all we can do with other people's thoughts/words, the same as we should be doing with our own thoughts and feelings; listening and thinking about them and deciding what we want to do with them.

If I were you, I would move to paper and write down as much about today's session, the way it comes to you and is comfortable. If I were you, for example, I'd be listing things like mad;

1. T thinks I am heartbroken because ________
2. T thinks I am having trouble getting over my ex because _______
3. I think I need to work on not using the word "can't" (I started by adding the word "yet" to the end of those sentences that I wanted to write as "can't") But I am pretty sure your T does not use the word "can't" but was telling you why you "have trouble" or "difficulty" getting over your ex, so far (or "yet")).
4. I would like to make a list of what T said that makes sense and why and what still puzzles me
5. I think I might not be gay because ___________; other people (T?) have told me I may be because _____________
6. I think T believes and said I should just "try to be happy" but that does not make sense because I believe one "is"/"is not" happy/unhappy so either I don't understand what "try" means in this case or there's some other misunderstanding of mine or T's we should discuss
7. I feel T thinks she is a failure because of my actions
8. I am annoyed that T told me this whole mess at once today and had phone calls and her next client came early.

Then I'd feel relieved because it was all out there instead of swirling around in my head making my head hurt and I could go do something else instead of thinking about it all the time, maybe think about one thing a day or just take the whole thing to T next session and ask her to pick one to discuss, etc.