I've been there, so I do understand how you feel being 35 and panicking about the future. With the benefit of hindsight though, I didn't need to. It very definitely isn't all over yet.
Figure out what you want your ideal future to look like, in real detail, away from your current situation. It will help pinpoint what's most important to you. Otherwise you're likely to act out of panic and fear rather than being proactive.
Is it a relationship, do you want to live with the partner, marry them? Does it need to be a big wedding and what's the house like, do you own it? Etc, etc Then if it is a partner, in finest detail what is it you want them to be? What sort of job do they do, what kind of family do they come from, what education, interests, politics do they have (or whatever is important to you) Do you want a baby? Do you want the baby with a partner? Would you have the baby out of a relationship? Is your career important to you? Does career progression figure in your future? Look at exactly what the picture of 5 or 10 years time looks like in an ideal world for you, and go into the minute detail of each aspect.
It's probably sounds daft, but digging down into what you want makes it easier to see how to get there and recognise it when it's infront of you. And when it's not. At the moment you have vague ideas probably based a bit, if you're really honest, on what you think is expected of a 35 year old woman and on what your friends or family may or may not think. To get that you're trying to mould a relationship into something it isnt, which is a waste of time and energy.
A friend once said to me, when querying a relationship as you're doing now, it really shouldn't be that complicated. She was absolutely right. If you're questioning it this much at this stage it's already a no goer. Experience tells me it is so much better to be happily single than miserably coupled up. Giving up on a relationship doesn't mean giving up on relationships though. This one just isn’t right.
At 37 I was single, unhappy, biological clock ticking down like a time bomb about to go off. I threw myself into something with a friend of a friend, because he was single and that was rare, and it must be better to find someone through friends than online and I just didn't have long left to find someone, full stop. I'd love to tell you it all worked out. It really didn't, but it took me 2 years of questioning everything about the relationship to finally let it go.
Nearing 40 I kind of gave up on desperately hunting a relationship. I had fun with friends, travelled, took a new job, started a hobby and I enjoyed it all. I knew I'd still enjoy a relationship with the right person, but who was that? I did what I've recommended you to do above. In finest detail I sketched out what my ideal man, relationship and our future together would look like. Then, I thought about how would I find that. I went online dating because that was where men looking for relationships were at that point in my life. I had a couple of dalliances that weren't what I'd sketched out, but I saw that straight away and could enjoy them for what they were. Then when I'd had enough of no strings, I found him. Pretty much exactly as described and exactly when I felt ready for it. There was no panic, no second guessing. I was excited, but it was very calm because I just knew this was right, because I knew what I wanted and that matched what he wanted.
By that point I was 41. We now have a 4 year old, house, career, dog, cat, all of it has happened. It's great. But I'm also very knackered, can't go on nights outs and trips away and we get very little time together now, as that's family life and responsibility. It's also paid off digging that deep because even good relationships are hard at times and having someone who you make a good team with makes hard times a little eaier to weather.
Athough I'm happy with my life and wouldn't change it, from here I can also see had it not happened I could be enjoying life in a different way. Travel, lunches with friends, reading lots of books, nights out, study or new career options, a house full of cats, early retirement. Those would have all been fun too.
When making the blueprint for your life base it on your wants and needs and expect others to base their plans on their wants and needs. You shouldn't be trying to make current boyfriend into something he's not but neither should you derail your plans to fit his life. Find what you want elsewhere, where it fits in easily. Best of luck.