Who are These People???

So I'm going through my text messages and I have like 50 conversations going on. (Don't ask me why I haven't deleted any of them yet.) And I noticed that three of my conversations don't have the contacts name. Then it dawned on me that I don't know who the hell these three people are AT ALL. I've been texting these people as far back as February. Back then I had just switched to the iPhone and lost the majority of my contacts. So instead of me asking the person from the beginning, "Who are you?" I pretended to know who I was talking to in hopes of figuring out who it actually was.

Unfortunately it is 3 months later and I still don't have an idea who I'm conversing with. One person is asking me about my phone, the other person is telling me how their in my neighborhood and they want to meet up with me and the other person wished me a Happy Valentines Day. I feel so ashamed right now because there is no way I can find out who I am talking to without embarrassing myself with the question, "Who is this again?"