Same anon who asked about the arrow tattoo. What do you think about collar bone for placement? With the arrow pointing toward my heart, as a way of saying "follow your own heart/path." I would also definitely design my own arrow or have my friend design it for me. I also don't think he's someone who's ever going to leave my life. I know that's something unpredictable but the things we've been through together are much deeper than the average bestfriendship. I wouldn't get it if I had doubts.
Collarbone would work but I will warn you that it’s going to be pretty painful since it’s nothing but thin skin and bone right there. I like that placement so I don’t want to discourage you from it, just be prepared for it. You could definitely point it towards your heart or just put it right over your heart running horizontally. It sounds like you know what you want, just go with your gut feeling. :)