Abortion😢

I'm 18 and my boyfriends 21, weve been together nearly 2 years, last week I found out I'm almost 6 weeks pregnant, he said he will support any desicion that I make, but he's told me he would rather have an abortion, I would be able to go and get the pill form of it as I'm under 9 weeks and I agreed to have an abortion, but I've cried almost every night thinking about it, I feel like such a horrible person but I live with my grandma and grandad and I feel like putting something so huge on them will be too much too, also I don't want to put a baby in my boyfriends life when I know he's not ready, I'm not ready. I just can't come to terms with it, am I being too sensitive? It feels strange knowing I'm so upset about aborting a baby I've never known before! 

I don't want to seem over the top as it doesn't seem to have upset my boyfriend even half as much as it has me!