Hi, I am new here.

What is life cycle of herpes simplex ?

It cannot be answered just like that. There is plenty of Medical Molecular Biology books which gives answer on your question but you need to read it whole.

For example: DNA Repair Proteins Affect the Lifecycle of Herpes Simplex Virus 1

As regarding to life cycle of herpes simplex we can answer like this:

Herpes simplex viruses types 1 and 2 (HSV-1 and HSV-2) are doublestranded DNA viruses with a genome size of 152 kbp. The genome consists of two unique regions, UL (long) and Us (short), flanked by repeated sequences. The two viruses are closely related, and both infect humans, producing mucocutaneous sores that are predominantly facial in the case of HSV-1 and genital in the case of HSV-2.

But many will not understand.