"你的过去,我来不及参与;但你的未来,一定要有我"
"Your past, I too late to participate in, but your future, I must be"
你的过去,我来不及参与;你的未来,我要紧紧相依
Your past, I too late participation; your future, I would like to firmly rely on each other
Although you spent your previous time without me,
I can not live the rest of my life without you.
or
Sorry for abzent in the past. I will always be here with you offering my best.