I am 20 years old in college... little sexual experience... the girl that im in love with, who loves me, but for some reason doesn't want commitment even though shes committed to loving me.. her and I have tried having sex a couple times and I feel like first off I don't get hard enoughh when I'm wanting to have an erection firm enough to penetrate her, and that I don't know how aroused it is i truly get.. i am going to try cialis and see if it makes a difference... I believe not having a rock hard erection is part of the reason this happens, but when im trying to insert myself into her i just cant seem to do it.... its embarrassing, but i cant seem to stick my penis in her vagina (it fits btw), and if i do, the position feels very weird.. almost awkward for my body, and I dont really know how to insert myself for any position... it just feels like im trying to insert my penis wrong, but as embarrassing as it is to ask, i need to ask it because i cant find help anywhere else for it, but anyone have any advice on how to actually insert myself easily? i have an average size and im really trying to learn and get this right.. also, and opinion on what i mentioned about getting aroused (and how to focus on the situation more to focus more on being aroused) and what the causes of that could be?

i would really appreciate imminent constructive criticism