If I take these pills, can the boy end up in me?

You did not specify what pills you were referring to. I suppose about contraceptive - perhaps Drosfemine tagged on the question. If so, please read on. Oral hormonal contraception provides very high protection against unwanted pregnancy if used correctly. Many couples choose not to apply additional safeguards in this regard. Nevertheless, the protection is not 100%, but rather more than 99% with ideal use. In this situation, it is up to you and your partner whether the negligible risk of getting pregnant is acceptable and you will decide to have intercourse with ejaculation in the vagina. It is worth noting that the condom, in addition to the contraceptive function, also protects against venereal diseases. I enclose additional information: https://www.gdziepolek.pl/artykuly/antykoncepcja-hormonalna