advice please

To cut a long story shot. I met this girl on this adult dating site in December. We met up for sex and then when I left I thought I have got to see this girl again so I did and one thing led to another and I went on seeing her off and on. Then she started staying the night at my place. Then I started to have feelings for this girl. I decided I really really liked her and did not know what to do. I do Reiki Healing and I am a Reiki Master and you can have this Reiki box where you write on a bit of paper all your feelings and thoughts and and dreams and anything thats worrying you that week into the Reiki box and hope it will work itself out. I was explaning about Reiki healing and the Reiki box and she opend the box and saw that I had writen down my feelings I have for her as she had had a bit to drink we made a joke of it. Then a few days latter I text her about it and she said do not spoil a good thing we have. We kept seeing each other and then today I did something wrong to upset her it was all my fault and she went mad at me like someone would if you were in a real relationship which we are not. I got really upset yes men can get upset. I made it up to her by sending a few garbled texts and going round to her place and making it up to her by dropping off some flowers and wine for her. Last night I met her friend for thre first and I would think last time and she said out loud to her friend in front of me and this other bloke my future husband is all mind and I plan to go on holiday with him and you can't have him. I did ask if she would like to come to Spain with me in the summer a few weeks ago and she did say yes.
As I have a small bit of Aspergus I sometimes get relationships wrong and fall for the wrong people. I just wonder dose she like me as just a friend with benefits or maybe she might like me a bit more than that. I think she just likes me as a friend with benefits.

Well considering that she saw how you felt about her and said "let's not ruin a good thing" would probably indicate that she is only really looking for a friend with benefits. Maybe she isn't ready for a proper relationship? If you are willing to wait then maybe give her a bit of time and see if she changes her mind? It may be that she's had bad relationships in the past and is a little scared to get caught up in another one just in case it ends up being the same. I'd say maybe wait a little bit longer and see how things go just be very careful. Don't let yourself get used by her. If she starts doing things like expecting you spend money on her but doesn't want to be your girlfriend then I'd steer clear but I suppose that is always easier said than done when you have feelings for someone. I wish you all the best.