Some said yes! it may influence our characters and emotions. Although, I think everyone has their own fears to tackle. I also do experience a "fear of heights"
I think, it could be true that your jealousy feelings is in some ways related to your past life or relationship that has not been so good and this left unresolved issues. I guess, that could put a negative effects on your present relationship with someone you love or close to you. Perhaps, you...