What would you do if you couldn't make your partner happy?

I'll keep this as brief as possible because I'm in desperate need for help. Alright so I'm in the closet to my family (well, my adult relatives). I'm not only not allowed to date a BOY, I can't imagine my father's reaction to finding out I'm dating a girl. Oh boy. Anyways, so my relationship with my girlfriend has been tough this summer. Apart from the trips I've taken, we haven't seen each other very often because I'm not allowed very much freedom to see "friends." But 99% of the time I've been allowed to go out, has been dedicated to her. She wanted to see me tomorrow but I started thinking and I can only assume that eventually everyone will begin to wonder where my other friends disappeared to. So I told her that I needed to be a bit more careful. Basically me lightly putting that I didn't want to hang out tomorrow. This didn't go too well.
Throughout the course of maybe two-three months, she's made comments like "I feel like your last choice. I don't feel like you try at all. I don't feel wanted. I feel like shit." Then comments like "I'm tired of this. I can't keep doing this anymore."
Basically a lot more has been said but they've slipped my mind. What I'm trying to say is I'm more convinced she's unhappy than actually happy with me. And it's totally understandable. She's a friend of mine to my family. She tries so hard to make plans but it's so complicated with most of my family being here to visit on vacation and not being allowed to go out much. I truly try as much as I can. And it's not enough. Not because she's selfish, but it wouldn't be enough for anyone really. Unless they were in the closet too.
I love her very much. More than I can express. But it pains me to hear how unhappy she seems. How can I endure the pain of knowing she doesn't feel important enough for me. OH and she's told me she cries of loneliness sometimes. Gosh. It makes me feel so upset to know I made her feel this way. I know she'd never want to be the one to end things, so Im beginning to think I should. I care about her happiness more than mine, and I don't know if I have anything else to give her to fill up the loneliness. I've shown her parts of me I haven't before. I came out to my school for her. I came out to my grandma and cousins for her. I pushed many buttons to go out on dates or have her over. There's just not much more I can do for the next year since I'll still be a senior and I don't want to cause her to be depressed.

What would you do if you were in my shoes? :c I'd appreciate as many perspectives as possible. Thanks so much guys.

 

Oh, definitely. Whenever we do see each other, I'll have a letter written for her to read when she gets home. Or I'll write poems for her. I enjoy writing and I think it really delights her to have someone actually write not only to her, but about her. I'll pick up her favorite snacks and have them ready when she comes over. I custom made a necklace for her that has lyrics to a song that means a lot to the both of us on it. Also, we talk on the phone at night and wake up to each other almost every single morning. I've definitely tried to over-supply on the "smaller" things or make up for what I can't always offer. We even joined the same gym to see each other at least that way.

As for the manipulation, I have to admit sometimes I do question about it. But it feels kind of wrong.

But that you mentioned friends, I think I just had a total realization moment here. Most of her "friends" kind of drifted away from her (we think it's unfortunately related to her coming out), and I think since she doesn't a very wide range of people to choose from now, it's left her feeling very lonely. However, I obviously can't make up for all of her friends. Do you think I should maybe approach it and ask her about it? I don't want to sound rude but she's stirred up many arguments about me not trying to see her as much as I should when I literally have arguments with my father to go out to see her.

Thanks for your response by the way, it was extremely helpful.

 

The problem is, we do have mutual friends but I don't think she likes my friends very much. And I've offered to make new friends with her, but she'll decline every time. "I don't like new people," she'll say. Which I totally understand. But I don't want to be the only person she has in her life. I can't handle that. I'm only one person you know?
I tried bringing it up just now and said that I'll need to start seeing my friends more because I've definitely pushed them away by only seeing my girlfriend. And she automatically assumed I want to be single and she wants to date someone who never gets tired of seeing her. Having balance and getting tired of her are two separate things.

Maybe this just won't work out. We see things entirely different and I don't think she understands how I'm doing all I can right now. Hm. Thanks so much for your help.