Open Question: Is my girlfriend worth dating for?

Okay, We’ve been dating for 4 months.
Im her first boyfriend. She’s 19 and I’m 21.
She’s living in a dorm with other 2 girls who has a boyfriend that going and sleeping over there too.
So we are actually 6 people in that house.

First there’s a good time and bad time. Also worst time.
the longer the time goes by the worst our relationship become.
And i’m trying to save it by communicating with her.

Problem is. She’s kinda disrespecting me lately.
Kinda lossing interest i dont know.

1: She bully me or make fun of me in front of our friend.
She even actually join my friend when they actually making a joke to me.
Like. she call me sometimes Old man (cause im older than her)
I ignore it cause i think she didn’t mean it. But it’s just so sad that the one you love is making fun of you.

2: She value her friend guy or girl than me.
She always ON to go whenever they will hangout. but not on me.She even fking ask her friends boyfriend to buy some food together. we’ve never hangout alone outside.
I ask her once but she said she’s busy.
Its like im just a solution on her bedtime. (sex thing ) thats it.

3: She only said i like you or i love you twice in 4 months. of our relationship.
4: She dont pay attention or give me affection in front of people.
Even we are alone. She rarely start any conversation to me. but she talk to too much
If she’s talking to her friends. Though her i am trying hard to make conversation.

5: She never open up to me. Express her feelings tell her problems about us. never not a single one.

6: Rarely text me . 7: i don’t even know if she still care to me.
I don’t even know if im still important to me.
She never give me a goodnight kiss or goodbye kiss first. But i always do.

Worst Scene no. 1

She give me a ride to go to my work. Then i text her that i will be finish in this time ~~
Then i late 5 minutes. And she actually didn’t wait and didn’t pick me off at work.
Her reason is i didn’t contact her. And she’s sleepy
(Holy moly. I check my phone she didn’t even reply how the fk i can contact her 1 more time )
But if its her friend she will wait or even text there.
Scene 2 :

same scene. She gave her friend a ride to their work. And me she didn’t even wake me up and i late to my work. She didn’t even apologize.

scene 3 : Worst scene. Yesterday. I meet her again and sleep over. We had Sx after that she said she wont sleep cause its her dayoff so i could go to sleep. I understand it.
Then her friends boyfriend came out to her girlfriends room to do some smoke.
And my girlfriend actually joined that guy leaving me in her room alone.
They talk have fun so much laugh that she never express on me.
And i just found out that shes sleeping in the living room ( She said she wont sleep)
I wake her up and tell her that if you will sleep lets sleep together in our room.
She refuse it and she said you already wake me up so i can’t sleep anymore.
I understand it again. 30 mins later she’s sleepign again. And i was piss and ask here do you want to sleep with me or not? She didn’t answer then her friends boyfriend will go back to her girlfriend room to sleep. My girlfriend stop that guy to sleep and said ( dont sleep yet pelase )
Wtf was that> Then i give her ultimatum. If i will sleep alone her well i rather leave and go home.

She was suprise then she go to our room fast. i talk to her all about this crap problem.
Taht you don’t value me or make me important despite the fact i respect you too much.
She said sorry i will fix and change.

Good thing. She let me meet her or stay to her everyday. She never turned me down if i will start something. But she never start anything.
Whenever i will stop meeting her. She will text me that she miss me. thats sometimes .

I tried to break up with her 2 times but she refuse. and her she is. still treating me like a crap.

Does this girlfriend really worth dating? I love her so much.

Sorry im japanese can’t do good grammar.

Open Question: Is my girlfriend worth dating for?