I am only 24, the PhD objective does not change my age. 24 is young! (I insist on it).
Hypothetically, a 24 y/o dating a 19 year old isnt 'weird'. UK undergrad is 3 years, MA 1 year. Theoretically, one can start a PhD at 22 here.
I have researched GL in both schools, UCLA has 1 (?) graduate fraternity, but obviously my distance means I can only get a snapshot of a perspective.
Related questions, can someone not start a BA course in the US in their latter 20's (for instance). When I was 18 and started college, my best mate was 24-a mature student. It wasnt an issue here, is US college life more compartmentalized?