I'm using her

TL;DR: I am only with her for the sex, because she doesn't give a damn about my ambitions or passion or anything about me in general.

For the patient; I will go into detail: I'm an entrepreneur (29M), all my life I've owned various businesses that have all failed. Because of this I've been incredibly depressed and want to opt out of this stupid life. In order to cope with the mental strain I take long walks around my neighbourhood which helps me clear my mind. On a good day I could do about 30 - 60KM walking around talking to myself trying to get my head straight.

On this one day I meet a girl (20F) who just finished her shift at this mall that's about 1KM away from my house, it was the first time I'd ever taken the route I took and she stops me to ask me where she can find the taxi to go back home and I tell her that unless she is willing to pay for a metre taxi she was fresh out of luck. After she tells me she can't afford one of those I decide to do the right thing and walk her back to my place to give her a lift home, at no charge of course. When we get into my car she doesn't even know how to get home (incredibly bad at directions) so if it wasn't for Google Maps then...

Anyway, I drop her off and her mom is thankful for the good samaritan I am blah blah blah and she takes my number. On my way back to my place she text's me and thanks me for doing this really nice thing for her and we start talking more after that and tells me that she will not be going back to the job because she would not have the money to pay for a metre taxi everyday in order to get home everyday.

We agree to meet about a week later and I pick her up for our first date. I was carrying the conversation throughout our date, asking questions, probing her on her passions and what she wants to be as she gets older. She tells me about her son (1year) and that she really doesn't know what she wants to with her life and doesn't know what her ambitions are... I take it as an "oh well, no one ever knows what they want to do in life I guess" and continue with the date carrying the conversation and asking all the questions. It felt like I was pulling teeth, no ambition, no goals, nothing.

Because I'm a hot blooded male, I end the date and suggest we stop somewhere and have a quickie. She agrees. I hadn't had s*x in about 16 months leading up to that date so I was pretty much willing to put up with anything as long as I got to cum. So we stop by the side of the road and have our first session. She's likes to use her nails and dug her nails right into my back during the session (lasted about 5 - 7min). Soon as I cum I am good and well and tell her I'm dropping her off, she agrees.

Since our conversation was so dry, it made it hard for my to be excited about having a conversation with her again so I didn't speak to her for like three days. After my manly needs kept giving me missed calls I decided to answer them and give her a call to check up on her. She was happy to hear from me and we met up again. We did the same thing, dry conversation... running out of teeth... Just a horrible conversationalist, very self-centred. We do the deed again and I drop her off at her place once again.

This time it's a week before I call her again and the same cycle keeps happening. She tells me she loves me, I don't respond. At least I was decent enough to not lie to her about that though.

It's got so bad that I don't even waste time talking anymore because I have no more teeth left. I pick her up, we do the deed then I drop her off and go dark again until I pick her up again. I don't understand why (most) women don't understand that men have feelings too, I most certainly provide everything for her and all but all she is good for is sex. She can't cook, likes to sleep, has no ambitions, doesn't want to invest in me (emotionally) so am I in the wrong for doing this?