you say this is more a moral belief than a religious one. In which case, if you think you're going to marry that person then maybe it's OK to sleep with them before you marry them?
You haven't said you love your bf, just that he loves you. Don't sleep with him just to please him, it's your virginity your losing, your religion, morals, respect. I reckon, if you think you'll marry the bf then it's OK to sleep with him before marriage. But I don't think you will marry him, by the fact you're talking about finding someone else.
When you're trying to meet someone else, don't say "no sex before marriage" at the outset, say you're a virgin and only want your first time to be special and with someone you love. Later, if you to keep to the marriage thing, then you can say it'd be really special to loose your virginity on your wedding night.
Anyway, I don't think you should sleep with your current bf, infact if he's making you feel pressurized I think you should dump him quick.