Yes! Anything is possible. My boyfriend and I have dated since the seventh grade, which is considered middle school at my school and we are still together and I'm a senior in high school!
The same as any relationship. People are people and no matter what their sexuality they need the same basic things-understanding, compassion,and respect. Love is a funny thing and at times seems out...
If you want your relationship to last long you should give the guy or girl there own space and not ask them about there personal life every minute they are away from you, also NEVER get suspicious...