Moon square Venus in synastry:
You love each other very deeply and the attraction between you is very strong, but your relationship is also prone to emotional ups and downs. It is not unusual for the quality of feelings that you have for each other to be quite different and this can lead to misunderstandings. For example, ~ may be in a romantic mood at a given time while ^ is feeling friendly, but not romantic. The roles sometimes reverse, and you find that your feelings frequently just won't synchronize. You also easily hurt each other's feelings, not realizing how much the other person loves and cherishes you. By being flexible and adaptable, and really trying to sympathize with each other, you can avoid these problems most of the time.
Check out the Love Relationship Compatibility Report for more insight!
Is your Moon square your partner’s Venus or vice versa? What’s it like?
It's weird how appealing this aspect is to me. I am always drawn to people whose Moon squares my Venus! I find them so lovable and cute. I feel like they care, and that brings out my own nurturing side too. It's true about sometimes your feelings not synchronising though.
I have this with someone he’s the Moon and I’m the Venus. I’ve read this is a bad aspect.
I wouldn't worry too much about it 
some people automatically assume squares are bad, but actually, hard aspects generate strong dynamic interactions between people. When I look at the synastry of all the couples and friends I know, there are always major squares and oppositions at work. Easy aspects help smooth things out and bring common ground, but there's a lot of passion that comes with hard aspects - for better or worse.