@Kimmaria,
Kimmaria wrote: I can't help but feeling insecure
that is something about you that you are going to have to work out - perhaps on your own, perhaps with the support of a counsellor, perhaps with your boyfriend in attendance at some point
__
unless you're 12 or 13, you're unlikely to be with your first love
people move on to good, lasting relationships with people who aren't their first love. Your insecurity is a separate issue.