Will a grade 2 hamstring tear haunt me for the rest of my life and/or soccer career?

No, it should not, most people will be able to resume their usual capacity before the injury.

Tight hamstrings are very common with men. Continued stretching and strengthening will be required into your weekly (if not daily) routine. Soccer requires quick starts and stops. Therefore, all your muscles. Once you make it part of your routine you will see progress.