@Storme, go on expensive dates with him (the aquarium is usually a good bet) every weekend to raise the MC's love impression. It's really hard to get Chase's up; I had the easiest time with Blaze's meter, but the hardest time with his.
Finally reviewing this game, long after playing it: I enjoyed the art - the sprites were well-drawn, and I liked the fact that costumes and special outfits were drawn as well. The virus was very cute! The stat-based gameplay was very repetitive, however, as were the date events. After one or two events, you've basically seen them all, but need to keep repeating them over and over again to raise love meters. More variation there, or a lowered requirement for repetition, would have helped replayability and enjoyment values. Also, while I appreciated that the game takes place over a 3-year period, the stat raising is, again, extremely repetitive, and got dull after a while.
Special events, such as Halloween parties or Tamera's quest, were done well. I enjoyed reading and playing through those quite a bit, and really enjoyed the mystery component in the latter. In summary, although I enjoyed the game the first time I played through it (Blaze's route was my favorite), replay value was hurt by the repetitive nature of the gameplay. I think the strength of the game lies in its unique events, and I would have preferred more focus on those rather than on stat-raising. A fairly good game overall.