Pressure from GF to move in together and say I love you. I'm not feeling ready and the pressure makes me want to leave

Have a relationship for 1.5 years M/F, both mid 20s. It has been going okay. I have been feeling very on the wall about the whole situation as I have been almost too giving and flexible with my time. This is close to the longest and most mature relationship I have been in.

  • She has recently wanted to push to move in together even though I am not ready. Pushing for it constantly for financial reasons as well as everyone she talks to asks why we are not moving in together. I am going through a transitional phase in my life and have always wanted to live alone and she says how will that be possible for you to afford and make happen. And I will continue to say that it's something I want so I will try to make it work. Again says she is being patient but then when I say maybe not this lease term, she gets extreme and says that oh well if we don't move in now then we won't until seven years together and what would other people think about that, not living together and being together for 7 years.
  • Upset that I don't tell her that I love her. Not reciprocating it, but for 7 months she has stopped saying it because I wouldn't start. I said I have never done that in relationship. Says she is being patient, but does not seem that way anymore. I don't want to force it and not mean it.
  • Within the past six months we talked about previous relationships. Said she has been in 15 and it made me feel extremely uneasy. I have only had maybe total of 4-5 partners. I felt like I was missing out on something that I should be experiencing. That she got to play the field and I didn't. I also had asked if our sex is good or better than the rest and she refused to answer saying that no matter what she said it would hurt me. I believe that is because it would have been negative.

  • Physically the relationship isn't going that well. I work out a good amount and she does physical activity with me (some of it) but not the intense kind I would like to see her doing to improve strength, body shape, and endurance. I have seen myself be much more attracted to these kinds of women and it has made me look at this attribute in her as negative.

    • Sex isn't great as well. I compare to the last 4 of my relationships and she doesn't do a lot of the things that gave me the most pleasure that the others did. This is because of reflexes and not liking the taste and things of that nature. I find myself more experimental. She did try which I appreciate so much, but is unable to make it happen and is disappointing because she isn't doing what I would overall want.

  • Considered the option of an open relationship. At least getting the sex I would like from others. Turned down

am I overthinking or these are actual issues?Are we just not compatible? What is compatibility?