I'm 14 & certain I've found the one

I'm 14 and have been saying my boyfriend for a year on Monday. We've had our ups and downs like any normal relationship but I'm certain that he's the one! I can't Mahoney life without him and I'm positive I want to spend my life with him. People keep telling me that I'm too young to know what true love is but I know that I love him, any thoughts?