Im scared he'll leave me :(?

In all honesty, if you have to worry about all of that, then it'll hurt like hell at first, but if you leave you can spare yourself that pain. Or, you can try push that thought out of your head and try to trust he won't. Love is a gamble, and you can only either throw in all of your chips, or fold out. There are no safe answers. Maybe you should just talk to him about how you feel, insecurity is only fed by doubt, getting it out in the open can ease it down, and if only for a little while. Keep talking about it every so often until it isn't on your mind anymore. And should that dreadful day ever come around, then hunny it wasn't meant to be. I wish you luck <3