strong urge to get married

Getting married to save oneself from sin

Q: I have a question about zina. For example there is a man named Adnan and a woman named Fatimah. Fatimah calls Adnan and asks him to come over. Now Adnan is scared he might to do zina with her. So he ejaculates without a partner. Is ejaculating worse then zina or would the sin had been lessened if he had gone to her? And also Adnan isn't capable to get married so was it ok for him to ejaculate without a partner from the intention of saving himself from doing zina? Of course it isn't permissible to ejaculate without a partner (istimbaat fil yad) but was it ok for him to do it that one time to save himself from zina? Should he have made sabr or was it ok for him to do that?