My Girlfriend likes to be choked when we have sex... Is this unhealthy?

When we have sex the only way she can *** is to have really rough sex. I choke her from behind when we have sex and I choke her while in the missionary position also. The sex is really good but the only way for her to *** is to have it rough. It pisses me off cause I like to make love occasionally and this kind of sex doesn't mean anything... or does it? I really love this person and want to spend the rest of my life with her but we've had huge arguments over this and I have made a mistake by calling her a whore and telling her that she has been corrupted by another dude. When we first got together she was very loose also... l am a big dude so I'm not used to being with someone that already can fit all of me and that also made me wonder about her maybe getting around allot and it's just hard for me to trust her about being faithful. I love her so much but she just makes me wonder sometimes... Please someone get this load off my shoulders lol.