"My experience was the exact opposite - it was all about sex and nothing to do with relationship."
That sucks

"how come you ended up as a BL given this scenario?"
This makes a great leap of logic that sexual experience as a young person causes one to be a BL, or that only one like yours causes it and a different one might not. I have met about quite a few BLs and GLs and know many more. I have seen NO consistent tale in childhood sexuality or anything else in their childhood. None. I am utterly convinced that people are BLs due to either genetics, prenatal environment, or less than 50% VERY young childhood (0-3) experiences. If it was a high percentage of something to do with young childhood there would be some common thread among BLs which I have not seen and neither have people I know who have met more other BLs than I have.

Plenty of non BLs have sexual encounters as children hence unless our numbers are much much higher than they seem than it is really not likely that childhood sexual experiences make someone a BL unless you mean a certain kind of experiences would do it. Given how hardwired BLs seem to be to their orientation I do not see how this would be possible unless the sexual encounter was in very young childhood when the brain is still forming. BLs seem to start having thoughts relating to being BLs before puberty as most other people do of any other orientation.

Yes I will push the issue with people almost every time I see people trying to lay up environment as the cause of their being a BL. If people feel they really don't want to debate fine that's ok just don't respond, I can't make anyone do so :p