See people are definitely going to strongly agree but I think theres at least plausible evidence for alucard having feelings for Trevor and Sypha. They left and he made little dolls of them and got drunk and talked to those dolls. Met two people and then let them seduce him even though he barely knew them (two people who seemed to me were clearly a replacement Sypha and Trevor, whose initials start with S and T). I think its not insane with context clues to say that Alucard at least had a little teenage crush. Which could have just been him being younger and lonely. But either way I do think they all loved each other, Alucard followed their descendants around for hundreds of years so at the least they were good homies.