my relationship problem: religion and insecurities

[ukgarage08]

im 20 yrs old and studying in the UK. im greek. i have been in a relationship with my guy for 9 months and it has been my longest relationship so far and the most serious one. the problem is that hes british, but hes half indian and half european, and hes a muslim. i dont have anything against his religion, and he doesnt really stick to it anyway, but my parents will once they find out. they know im dating him, but they dont know that its serious and i know that they will never approve, so i dont know what to do there. and i feel really bad telling him that they wont approve because of his religion.
another problem, is that as i've been hurt a lot by guys previously, i come out as being really insecure in this relationship even though i don't really show it. he tells me he loves me all the time, that its the first time he ever felt like this, and i can see it in his eyes everytime he says so, but i still think that its going to end eventually. we dont really talk about the future, and he told me generally that he doesnt believe in marriage because his parents split up recently. im not looking for marriage at all, but he kind of shows to me that its not gonna go anywhere, that its just gonna be a relationship. he was traumatised by his ex as well because she was really obsessive and it took him some time to get over that, and talk about his feelings to me. he tells me things like, we should go somewhere before christmas, and go somewhere in europe during easter. i dont know how he sees our relationship and i dont want to ask him cause i dont want him to think im insecure. also i cant help but think that its gonna end, and that im gonna be hurt again, and that i wont be able to love again. how do i get over this? and most of the time im very pessimistic in my relationship and even though i dont show it, i keep on saying stuff that hurt him at the end, like 'oh how do u know we will still be together in easter?' i wanna get over this, but i cant stop thinking that at the end its gonna end...