Is it normal that i know i like men, but fallen in love with a girl?

I know for a fact that I'm straight. I KNOW this. I am not confused or bi sexual or pansexual or any of that. I'm straight. But I've recently fallen in love with a girl. Its like shes an exception to my sexuality and I'm an exception to hers. I never have had the same feelings about any girl at all. We fell in love long distance mostly texting and then when we finally talked on the phone I realized, "Oh my god... I REALLY love this girl. This isn't just a weird passing feeling" We always cared very much for each other but we never understood how real it felt until we actually talked. I don't want to marry her, or date her. I do want to kiss her and hold her and tell her how much I love her and be intimate with her. But we both know we'll never be able to be together, and we're both alright with that. If she were to meet some guy tomorrow and fall madly in love with him I would be happy for her. I wouldn't have one ounce of jealousy or hurt in my body. And I know she feels the same about me. But I am in love with her, more than I ever have or ever will love someone else. We'll both have these feelings for each other until the day we die. And I truly think she will forever be my true soul mate. No one will ever, ever be able to compare to her. But I know we'll live our own lives, and this doesn't make me sad or mad or anything. Has this type of thing ever happened to anyone? It makes me question all sexuality and what it all really means. It almost proves the fact to me, "love is blind" and the whole situation just baffles me. Am I completely alone in this? By the way, we're meeting for the first time next week and I'm so excited I can hardly contain myself. (And please don't just comment with "Oh you've never actually met her so you don't really know her" I know her better than anyone and she knows me better than anyone. You can actually find out a lot more from a person long distance because it makes you not as vulnerable.)