Don't say...

Don't say " PROMISE"
if u not sure u can prove it...

Don't say "WILL"
if u not sure willing do anything...

Don't say "ALWAYS"
if u not sure what will happen in 'd future...

Don't say "LOVE"
if u not sure u'll take care of that...

Don't say "U"
if u not sure s/he is 'd only 1...

So...

Don't say "I PROMISE WILL ALWAYS LOVE U"
if it doesn't mean 'd same...