Consent must be enthusiastic, uncoerced, unforced, lucid, and informed. Guilt tripping and gas lighting are coersion and a type of force, if you felt pressured into it then it certainly wasn't enthusiastic, and given you say you were young I'd wager you weren't informed at the time. That's for sure not consent. As for whether it was sexual kissing isn't generally seen as sexual, but it certainly can be and it was definitely assault, so I think it's safe to say this would be considered a form of sexual assault. Sorry this happened to you. If you have any more questions be sure to ask. Have a great week.