He's mentioned proposing soon. I think he changed my birth control to propose.

TL;DR: Boyfriend changed my birth control and won't tell me why<br><br>I'm 22(f) and my bf (23m) is amazing. We get along so well, we have so much in common, he's the kindest boy, we have so much fun together and he's honestly an amazing boyfriend. We've been together four years and lived together for one. <br><br>I am on the pill (for my acne), and my doctor requires that I get regular blood tests to prove I'm still taking it. He did a blood test this morning and phoned to say that my bf was lying. When I asked what he meant, he explained that the blood tests showed no presence of the pill in my system, but mentioned that maybe I had a bad pill out of the pack and I just needed to be more consistent with taking it. <br><br>I know I'm consistent, I take it at the exact same time every day and I know I put one on my tongue and swallow it every single time, and I've been taking the pill for years with no problems and I trust myself to take a pill correctly. <br><br>Later I confronted him politely and asked if he had been trying to trick me and have a pregnancy scare. I told him I knew he was looking at proposing when we move to a big city in a year, and I know he wants kids straight away, but I'm not ready to have kids. He said that the city and kids discussion was just him being excited and talking about ideas and not set in stone, but admitted to tampering with my pills. <br><br>He told me he replaced the pills in my pack with sugar tablets, because he wants to have a pregnancy scare and surprise me with a ring. He says it's romantic because he wants to bring new life into the world and he wants to marry me because I'm the love of his life. He says it's only a pregnancy scare and I'm still on birth control, because we'll be getting a full STI and pregnancy test before he proposes, and he'll replace the sugar tablets with the pill before then so that the test will show negative and I won't figure it out.<br><br>I feel like he's manipulating me and it's creepy that he thinks it's okay to tamper with my birth control. It's not romantic at all, and I don't feel special, I feel like he's trying to trap me into marrying him. I don't feel comfortable even taking a pill from him now, because I don't know if it's sugar or not. I told him it wasn't romantic and he was manipulating me and he said that was rude and I should have been grateful that he was so excited to marry me and be a father.<br><br>What do I do?