I think it's also important to acknowledge that something like homophobia cannot really be compared to someone saying they don't think it's cool to date a 19 year old. The LGBTQ community has been oppressed and marginalized for many many years, mocked and hunted and killed and harassed in large numbers. I don't think it's fair to say that the oppression of homophobia and someone hurting your feelings because they don't approve of your young girlfriend are the same kind of pain.