Longing for a dog i rescued and gave up to animal shelter

On Wednesday last week I rescued a doggy that was being abused. I took him home and he spent two nights by me and then another night by my girlfriend before we took him to an animal shelter.

The shelter is pro life and won't put him to sleep even if they don't find a home for him. So his future his secure.

The only problem is that in the two days I had him with me he really grew on me. I love animals but don't have my own pets because of my circumstances at home and I also was maybe scared of the the responsibility. It would be difficult for me to keep him because he might end up being at home without supervision.

I took him to the animal shelter with a very heavy heart and I was hoping to try and convince my girlfriend to keep him. She already has 3 dogs and there is a still an option of maybe getting him back from the animal shelter before they put him up for adoption. My girlfriend says I am putting pressure on her to take the dog and we are fighting at the moment about it.

I think there is something wrong with me because I have been dreaming about this dog for the last two nights and I have really strong feelings about wanting to keep this dog, it feels almost like destiny or fate sent him to me. I could see that he became just as attached to me and would follow me all over watching my every little move.

What do I do? Should I try and convince my girlfriend to get him back so that I can have him in my life again or should I try to get over him?

This might sound really stupid but I feel really strongly about this and its making me feel seriously depressed and the thought of never seeing him again is making feel like there is no hope for anything else in the future.

Where are these feelings coming from I never thought I would be feeling like this after rescueing him. I have rescued a couple of other animals in the past and had lots of contact with dogs and never felt these feelings before.

Should I fight for my feelings and try to get the situation to work out in my favour, or am I being selfish and just thinking of my own feelings because I want to have this dog around? Will this dog be able to move on because when I left him by my girlfriend he sulked for me for hours and we had only known eachother two days.

Too many questions and no answers. I have been trying so hard to get over this and nothing works. This all seems so crazy what do I do? Is this normal or is something wrong with me, should I follow my heart even if it will cause difficulty?